---
title: "CVE-2026-76440: Cisco Secure Email Gateway & Secure Email and Web Manager - Path Traversal"
description: "Cisco Secure Email Gateway and Cisco Secure Email and Web Manager contain path traversal vulnerabilities caused by improper input validation, letting attackers access unauthorized files, exploit requires crafted requests."
url: https://panop.io/threat-heartbeat/CVE-2026-76440/
---

# CVE-2026-76440 Cisco Secure Email Gateway & Secure Email and Web Manager - Path Traversal

Cisco Secure Email Gateway and Cisco Secure Email and Web Manager contain path traversal vulnerabilities caused by improper input validation, letting attackers access unauthorized files, exploit requires crafted requests.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.62% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-76440)

## Details

Type

Path Traversal

Impact

File System Read, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-23](https://cwe.mitre.org/data/definitions/23.html)

## Vendor fix

Update to the latest software hardening release provided by Cisco.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-76440](https://nvd.nist.gov/vuln/detail/CVE-2026-76440)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm)
- [https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification](https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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