October 16, 2026

CVE Watchtower

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CVE-2026-101955NVD

Vulnerability Summary

A Stack-based Buffer Overflow vulnerability in the UTM Anti-Spam SBL of Juniper Networks Junos OS on SRX series allows an unauthenticated remote attacker to cause arbitrary code execution or a denial of service via a injected malformed DNS packet when Anti-Spam SBL inspection is enabled.
Severity Level
CRITICAL(9.2)
Published Date
Oct 14, 2026
Last Modified
Oct 16, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.57%Probability
Root Weakness (CWE)
CWE-121: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v4.0 Base Metrics — Score 9.2 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsPresent
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)Low
CVSS v3.1 Base Metrics — Score 8.1 (HIGH)
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Juniper Networks Junos OS < 23.2R2-S7.7
  • Juniper Networks Junos OS >= 23.4 and < 23.4R2-S8.13
  • Juniper Networks Junos OS >= 24.2 and < 24.2R2-S5.5
  • Juniper Networks Junos OS >= 24.4 and < 24.4R2-S5
  • Juniper Networks Junos OS >= 25.2 and < 25.2R2-S2
  • Juniper Networks Junos OS >= 25.4 and < 25.4R1-S3
  • Juniper Networks Junos OS >= 26.2 and < 26.2R1-S2
Patched Versions
  • Juniper Networks Junos OS 23.2R2-S7.7
  • Juniper Networks Junos OS 23.4R2-S8.13
  • Juniper Networks Junos OS 24.2R2-S5.5
  • Juniper Networks Junos OS 24.4R2-S5
  • Juniper Networks Junos OS 25.2R2-S2
  • Juniper Networks Junos OS 25.4R1-S3
  • Juniper Networks Junos OS 26.2R1-S2
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🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References