CVE intelligenceCISA KEV

CVE-2026-76461

Cisco Secure Email Gateway SQL Injection Vulnerability

Published Sep 14, 2026Sources checked Oct 29, 2026

9.8CRITICALCVSS out of 10

What this means

Actively exploited

CISA lists CVE-2026-76461 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to Cisco Secure Email Gateway.

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Public exploit: Not collected.

Cisco Security Advisories: Exploitation reported by Cisco Security Advisories (2026-09-17)
In September 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability.

What to do next

Remediation and response

Review the linked vendor advisory and apply the mitigation or fixed release for your affected product.

Cisco Security Advisories guidance

Vendor revision: Sep 17, 2026

Cisco has released software updates that address this vulnerability.

CISA KEVListedObserved exploitation

EPSS29.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors1Source-linked actor relationships

Overview

What is CVE-2026-76461?

A vulnerability in the email parsing of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system.

This vulnerability is due to insufficient validation in the email parsing logic. An attacker could exploit this vulnerability by sending a crafted email message that contains malicious SQL statements through an affected device.

A successful exploit could allow the attacker to execute arbitrary SQL statements, leading to command execution with root privileges on the underlying operating system.

Source: NVD

Reported activity: In September 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability.
Cisco Security Advisories · Published Sep 17, 2026

CISA says:Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.CISA catalog due date Sep 17, 2026