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cve recordhighexploited in the wildzero day3 of 3 cataloguesexploit reported

CVE-2026-76461

Cisco · Secure Email Gateway · Cisco Secure Email Gateway SQL Injection Vulnerability

· Added to CISA KEV
CVSS—
Severityhigh
Weakness—
EPSS29.5%98.2th percentile
Exploited3 KEV sources
Ransomware useUnknown
Federal fix dueSep 17, 2026
patch window

Called exploited the same day it was disclosed.

Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.

The life of this vulnerability

  1. CVE reserved
  2. CVE published26d
  3. First KEV listingsame day
  4. Last sightingsame day

Gaps are compressed to equal steps. The elapsed time is printed under each.

Which catalogues call it exploited

Sources3 of 3
Listings differ by0 d
Strongest claimconfirmed

3 catalogues list it. CIRCL aggregates the others and is shown but not counted.

Public exploitation evidence

1 public report collected from VulnCheck and CIRCL, first on Sep 14, 2026. Each links to its original source. We have not verified them.

Description

Cisco AsyncOS software for Cisco Secure Email Gateway (SEG) contains a SQL injection vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system.

Required action (CISA)

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.

References

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Our coverage of CVE-2026-76461

CVE-2026-76461high

Week in review: Cisco patches exploited email gateway 0-day, Revolut breach

Cisco has confirmed that attackers are actively exploiting a zero-day SQL injection vulnerability, tracked as CVE-2026-76461, in its Secure Email Gateway appliances. The company's Product Security Incident Response Team became aware of the exploitation in September 2025 and has since provided indicators of compromise for organizations to check for potential breaches.

CVE-2026-76461critical

U.S. CISA adds Cisco Secure Email Gateway flaw to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical vulnerability in Cisco Secure Email Gateway, identified as CVE-2026-76461, to its Known Exploited Vulnerabilities (KEV) catalog. This addition mandates that federal civilian executive branch (FCEB) agencies address the flaw by September 17, 2026, to protect their networks from active exploitation.