---
title: "CVE-2026-76461: Cisco AsyncOS Software for Cisco Secure Email Gateway - Command Injection"
description: "Cisco AsyncOS Software for Cisco Secure Email Gateway contains a command injection caused by insufficient validation in email parsing logic, letting unauthenticated remote attackers execute arbitrary commands with root privileges, exploit requires sending crafted email messages."
url: https://panop.io/threat-heartbeat/CVE-2026-76461/
---

# CVE-2026-76461 Cisco AsyncOS Software for Cisco Secure Email Gateway - Command Injection

Cisco AsyncOS Software for Cisco Secure Email Gateway contains a command injection caused by insufficient validation in email parsing logic, letting unauthenticated remote attackers execute arbitrary commands with root privileges, exploit requires sending crafted email messages.

CVSS base score 9.8 /10

Critical

CISA KEV

Exploited in the wild

Public exploit

Proof of concept available

Authentication

Not required

EPSS

29.54% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-76461)

## Details

Type

Command Injection

Impact

Remote Code Execution, Privilege Escalation

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-89](https://cwe.mitre.org/data/definitions/89.html)

## Vendor fix

Update to the latest available version of Cisco AsyncOS Software for Cisco Secure Email Gateway.

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-2026-76461](https://nvd.nist.gov/vuln/detail/CVE-2026-76461)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX)
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field\_cve=CVE-2026-76461](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76461)

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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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