VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 9.8 criticalEPSS 0.6% probability of exploitation in 30 days
Cisco

CVE-2026-76440: Cisco Secure Email Gateway Security Hardening Release

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.6%

EPSS score, percentile 49.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
9.8 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • 14.0.0-698
  • 13.5.1-277
  • 13.0.0-392
  • 14.2.0-620
  • 13.0.5-007
  • 13.5.4-038

and 18 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Cisco Cisco Secure Email
StatusVersions
Affected14.0.0-698
Affected13.5.1-277
Affected13.0.0-392
Affected14.2.0-620
Affected13.0.5-007
Affected13.5.4-038
Affected14.2.1-020
Affected14.3.0-032
Affected15.0.0-104
Affected15.0.1-030
Affected15.5.0-048
Affected15.5.1-055

Versions not listed are: unknown.

And 12 more version entries in the CVE record.

Cisco Cisco Secure Email and Web Manager
StatusVersions
Affected13.6.2-023
Affected13.6.2-078
Affected13.0.0-249
Affected13.0.0-277
Affected13.8.1-052
Affected13.8.1-068
Affected13.8.1-074
Affected14.0.0-404
Affected12.8.1-002
Affected14.1.0-227
Affected13.6.1-201
Affected14.2.0-203

Versions not listed are: unknown.

And 20 more version entries in the CVE record.

Source: CVE List, as of . About the data.

About this vulnerability

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 t…

Summary: CVE record, as of .

  • CISA has not added CVE-2026-76440 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 14 Sep 2026.
  • The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.6% (percentile 49.8), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact total.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

Cisco Secure Email Gateway Security Hardening Release

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.

Source: CVE List, as of . About the data.

Weakness

CWE-23

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

1

Known exploited Cisco vulnerabilities

  • CVE-2026-76418: Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability (added )
  • CVE-2026-76519: Cisco Secure Email Gateway Relative Path Traversal Vulnerability (added )
  • CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability (added )
  • CVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability (added )
  • CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability (added )