8.6
High
CVE-2026-20295 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, remote attacker to exhaust the available memory of an affected device. This vulnerability is due to improper management of memory resources during sftunnel TLS connection setup. An attacker could exploit this vulnerability by sending crafted sftunnel TLS frames to an affected device during the connection setup. A successful exploit could allow the attacker to exhaust the available memory on the affected device, which could result in a DoS condition.
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 → 7.4.6 | 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 → 7.0.9 | 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 Hide 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 → 7.4.4 | 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 → 7.0.9 | No fix stated |
References
- cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3 sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
Other CVEs of Cisco Secure Firewall Management Center (FMC)
The 29 CVEs of Cisco Secure Firewall Management Center (FMC) →
CVE-2026-20342
A vulnerability in a specific file download API of Cisco Secure FMC Software could allow an authenticated, remote…
7.7
High
CVE-2026-20323
A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software and Cisco Secure FTD…
8.3
High
CVE-2026-76412
A vulnerability in the remote diagnostics debugger of Cisco Secure FMC Software could allow an authenticated, remote…
8.5
High
CVE-2026-20333
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security…
8.8
High