Vulnerability · Published Sep 14, 2026 · Assigned by cisco
CVE-2026-76443Cisco Secure Email Gateway Security Hardening Release
Critical 9.8
In plain English
A critical-severity security flaw in Cisco Secure Email from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit.
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Email | 14.0.0-69813.5.1-27713.0.0-39214.2.0-62013.0.5-00713.5.4-03814.2.1-02014.3.0-032 |
| Cisco | Cisco Secure Email and Web Manager | 13.6.2-02313.6.2-07813.0.0-24913.0.0-27713.8.1-05213.8.1-06813.8.1-07414.0.0-404 |
Weakness: CWE-707 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H