Critical Alert 4 Active Exploits Detected Today

CVE-2026-93952 — Arista VeloCloud Orchestrator Improper Input Validation Vulnerability →
CVE-2026-94127 — F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability →
CVE-2026-93616 — Check Point Multiple Products Path Traversal Vulnerability →
CVE-2026-85102 — Check Point Multiple Products Improper Certificate Validation Vulnerability →
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September 23, 2026

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CVE-2026-20248NVD

Vulnerability Summary

A vulnerability in the DNS over TCP implementation of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the TCP DNS response handler to unexpectedly restart, causing the device to reload.

This vulnerability is due to a logic error when parsing a DNS query and tracking the size of the incoming buffers. An attacker could exploit this vulnerability by formatting a crafted reply to a DNS query sent from the targeted device. A successful exploit could allow the attacker to cause the device to reload, causing a denial of service (DoS) condition.
Note: The attacker must be able to respond to DNS queries from the device, either by controlling the DNS service or through a machine-in-the-middle attack.
Severity Level
MEDIUM(6.8)
Published Date
Sep 16, 2026
Last Modified
Sep 18, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.34%Probability
Root Weakness (CWE)
CWE-195: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 6.8 (MEDIUM)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.1.28
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2.7
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2.11
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2.13
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.2.14
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3.14
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3.15
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.1.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.2
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3.19
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.3.23
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.2.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.2.7
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.9
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.2.8
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.14
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.18
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.9
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3.39
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.19
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.12
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3.46
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.27
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.18
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3.53
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3.55
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.38
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.39
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.3.56
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.42
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.22
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.1.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.24
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.48
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.8
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.2
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.27
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.55
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.22
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.2.10
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.57
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.28
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.24
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.2.21
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.61
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.31
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.29
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.2.22
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.62
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.34
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.67
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.70
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.40
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.1.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.71
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.4
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.47
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.7
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.37
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.76
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.9
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.38
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.50
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.1.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.10
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.1.2
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.52
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.13
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.1.6
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.53
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.82
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.16
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.19.1.42
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.57
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.84
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.3.20
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.4
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.7
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.9
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.13
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.7
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.13
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.66
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.10
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.19
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.85
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.14
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.67
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.24.1
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.68
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.22
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.14
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.20
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.71
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.19
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.26
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.89
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.2.32
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.76
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.3
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.24.1.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.22
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.24.1.9
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.28
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.22.3.5
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.16.4.92
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.135
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.195
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.30
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.24.1.155
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.23.1.32
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.24.1.11
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.34
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.18.4.82
  • Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software >= 9.20.4.235
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.0.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.1.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.2.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.3
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.0.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.4
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.5
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.3.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.3
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.3.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.4
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.6
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.5
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.4.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.3.1.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.6.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.5.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.6
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.6.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.1.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.7
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.5.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.3.1.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.8
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.6.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.8.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.6.3
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.2.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.9
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.7
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.7.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.2.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.10
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.6.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.2.3
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.8
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.6.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.7.10
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.7.11
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.8.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.6.2.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.7.10.1
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.2.4
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.10.2
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.3
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.6.4
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 10.0.0
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.4
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.0.9
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.2.11
  • Cisco Cisco Secure Firewall Threat Defense (FTD) Software >= 7.4.7
Patched Versions
Not provided by cveorg for this CVE.
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📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
⚙️Custom EPSS — Filter noise, focus on risk.
💬Webhooks — Slack & Teams integration.
🚫Ad-Free — Uninterrupted experience.

External References