October 28, 2026

CVE Watchtower

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CVE-2026-20341NVD

Vulnerability Summary

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software could allow an authenticated, remote attacker to obtain root privileges.

This vulnerability is due to unsecured deserialization of untrusted data over the sftunnel management connection. An attacker could exploit this vulnerability by sending crafted sftunnel remote procedure calls (RPCs). A successful exploit could allow the attacker to gain root privileges on a device that is running Cisco Secure FMC Software and its high-availability peer.
To exploit this vulnerability, the attacker must have valid administrative credentials on a managed Cisco FTD device.
Severity Level
CRITICAL(9.1)
Published Date
Sep 16, 2026
Last Modified
Sep 18, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.45%Probability
Root Weakness (CWE)
CWE-502: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.1 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.0.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.1.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.2.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.0.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.4
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.5
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.3.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.3.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.3.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.4
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.6
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.4.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.5
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.3.1.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.6.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.5.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.6
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.1.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.6.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.7
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.5.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.3.1.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.8
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.8.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.6.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.2.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.9
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.7
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.7.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.2.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.10
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.2.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.8
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.7.10
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.10.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.8.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.2.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.10.2
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.7.10.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.2.4
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.3
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.7.11
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.4
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 10.0.0
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.4
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.5
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.0.9
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.2.11
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.7.12
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.6.5
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.6
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 10.0.1
  • Cisco Cisco Secure Firewall Management Center (FMC) >= 7.4.7
Patched Versions
Not provided by cveorg for this CVE.
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🚫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