CVE-2026-76440CWE-23

CVE-2026-76440

Critical · published September 14, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
49.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00623 · 49.2th percentile
Weakness
CWE-23 · Relative Path Traversal
Published
2026-09-14T21:17Z
References (2)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm · [email protected]https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 17 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 14 SEP 16:08Z
    Cisco Secure Email Gateway Security Hardening Release
    cvelistv5