Vulnerability in Cisco Secure Email
CVE-2026-76443
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.024 · change: +0.018
Affected products
- Cisco Secure Email — versions 13.0.0-392, 13.0.5-007, 13.5.1-277
- Cisco Secure Email And Web Manager — versions 12.8.1-002, 12.8.1-021, 13.0.0-249
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2026-76443?
- CVE-2026-76443 is a critical-severity vulnerability in Cisco Secure Email, classified under CWE-707. CVSS score: 9.8/10. Published 2026-09-14.
- How severe is CVE-2026-76443?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-76443 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.