CVE-2026-76443 Cisco Secure Email Gateway Security Hardening Release
Cisco Secure Email Gateway received security hardening updates to address internally discovered vulnerabilities related to improper neutralization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76443?
CVE-2026-76443 is a critical vulnerability in Cisco Secure Email, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76443 are related to issues with improper neutralization that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.
Weakness: CWE-707
Which versions are affected by CVE-2026-76443?
How do I fix CVE-2026-76443?
No fix has been published for CVE-2026-76443 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76443 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76443 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-7r4m-5539-57x5.