EUVD-2026-77626
GHSA-wq94-r9v8-g7wm
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V2 - Validation and Business Logic Input size validation
|
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Sep 15, 2026
Cisco Secure Email Gateway and Cisco Secure Email and Web Manager ship a hardening release that fixes multiple internally discovered input-validation defects grouped under CVE-2026-76442 (CWE-1284, improper validation of specified quantity in input). Successful exploitation by an unauthenticated remote attacker degrades availability (CVSS 3.1 7.5, AV:N/AC:L/PR:N/UI:N, C:N/I:N/A:H) on the affected appliances, potentially interrupting mail flow and administrative access. No public exploit code has been identified at time of analysis and the issue is not listed in CISA KEV; CISA's SSVC assessment rates exploitation as none and automatable as no, so weaponization is not currently expected.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Know when Cisco Secure Email gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (cisco) · only source for this CVE.
CVSS VectorVendor: cisco
DescriptionCVE.org
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-2026-76442 are related to issues with improper validation of specified quantity in input that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-1284.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
More in Cisco Secure Email
View allUnauthenticated remote command execution with root privileges affects Cisco Secure Email Gateway running affected AsyncO
Unauthenticated remote code execution in Cisco Secure Email Gateway allows attackers to write arbitrary files and execut
Improper-neutralization flaws (CWE-707) in Cisco Secure Email Gateway and Cisco Secure Email and Web Manager - disclosed
Path traversal vulnerabilities (CWE-23) in Cisco Secure Email Gateway (ESA) and Cisco Secure Email and Web Manager (SMA)
Unauthenticated remote attackers who can reach a Cisco Secure Email Gateway or Secure Email and Web Manager deployment c
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient message integrity v
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient validation of messa
Exploit-DB