CVE-2026-76440 Cisco Secure Email Gateway Security Hardening Release
Path traversal vulnerabilities in Cisco Secure Email Gateway allow attackers to access or modify restricted files, requiring immediate patching.
- 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-2026-76440?
CVE-2026-76440 is a critical path traversal 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-2026-76440 are related to path traversal issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-23.
Weakness: CWE-23
Which versions are affected by CVE-2026-76440?
How do I fix CVE-2026-76440?
No fix has been published for CVE-2026-76440 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-76440 being exploited?
There is no known exploitation of CVE-2026-76440 in the wild and no public exploit code.
Sources
Also known as GHSA-rx6x-7px9-ppg5.