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8.3 High

CVE-2026-20323 A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software and Cisco Secure FTD…

Description

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to impersonate the peer device and obtain access at the level of the manager role, which is equivalent to root. This vulnerability is due to improper management of the TLS certificate for the sftunnel management connection. An attacker could exploit this vulnerability by connecting to the sftunnel port using a crafted TLS certificate. A successful exploit could allow the attacker to become a registered sftunnel peer with root access. Note: The attack is successful only if the sftunnel connection is down or the attack can disrupt the sftunnel connection long enough to execute the attack.

Affected products and versions

Product Affected versions Fixed in
Cisco Secure Firewall Management Center (FMC) 10.0 10.0.0 → 10.0.1 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.7 7.7.0 → 7.7.12 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.6 7.6.0 → 7.6.5 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.4 7.4.0 → 7.4.7 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.3 7.3.0 → 7.3.1.2 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.2 7.2.0 → 7.2.11 No fix stated
Cisco Secure Firewall Management Center (FMC) 7.0 7.0.0 → 7.0.10 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 10.0.0 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 7.7 7.7.0 → 7.7.11 No fix stated
Show the 5 other branches
Product Affected versions Fixed in
Cisco Secure Firewall Threat Defense (FTD) Software 7.6 7.6.0 → 7.6.4 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 7.4 7.4.0 → 7.4.7 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 7.3 7.3.0 → 7.3.1.2 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 7.2 7.2.0 → 7.2.11 No fix stated
Cisco Secure Firewall Threat Defense (FTD) Software 7.0 7.0.0 → 7.0.10 No fix stated

References

Timeline

  1. Published
  2. Last modified

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