CVE-2026-76443

PUBLISHED
Published: 14 Sept 2026, 16:08
Last modified:14 Sept 2026, 16:08

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 Sept 2026, 16:08
Published
Vulnerability first disclosed

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Techniques & Countermeasures

  • CWE-707•Improper Neutralization

    The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.

Affected Systems

  • cisco•cisco secure email

    14.0.0-698 | 13.5.1-277 | 13.0.0-392 | 14.2.0-620 | 13.0.5-007 | 13.5.4-038 | 14.2.1-020 | 14.3.0-032 | 15.0.0-104 | 15.0.1-030 | 15.5.0-048 | 15.5.1-055 | 15.5.2-018 | 16.0.0-050 | 15.0.3-002 | 16.0.0-054 | 15.5.3-022 | 16.0.1-017 | 15.5.4-012 | 16.0.4-016 | 15.0.5-016 | 16.0.2-112 | 16.0.3-044

  • cisco•cisco secure email and web manager

    13.6.2-023 | 13.6.2-078 | 13.0.0-249 | 13.0.0-277 | 13.8.1-052 | 13.8.1-068 | 13.8.1-074 | 14.0.0-404 | 12.8.1-002 | 14.1.0-227 | 13.6.1-201 | 14.2.0-203 | 14.2.0-212 | 12.8.1-021 | 13.8.1-108 | 14.2.0-224 | 14.3.0-120 | 15.0.0-334 | 15.5.1-024 | 15.5.1-029 | 15.5.2-005 | 16.0.0-195 | 15.5.3-017 | 16.0.1-010 | 15.0.1-035 | 16.0.2-088 | 15.5.4-007 | 15.0.2-007 | 16.0.4-010 | 16.0.3-016

References (1)