# CVE-2026-76461 — Cisco Secure Email **CISA KEV** > As of 2026-09-15, CVE-2026-76461 is a CRITICAL-severity vulnerability in Cisco Secure Email, CVSS v3.1 9.8, EPSS 2.1% (81.2th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-14), with a US federal remediation deadline of 2026-09-17. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-76461, most recently “CISA Adds Actively Exploited Cisco Secure Email Gateway SQL Injection (CVE-2026-76461) to KEV Catalog”. **Last updated:** 2026-09-15 ## 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. The record classifies CVE-2026-76461 under weakness class [CWE-89](https://cwe.mitre.org/data/definitions/89.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 6 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **EPSS (FIRST):** 2.1% probability of exploitation in the next 30 days, higher than 81.2% of all scored CVEs - **CISA KEV:** Listed since 2026-09-14, federal remediation deadline 2026-09-17 - **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9 - **Published:** 2026-09-14, last modified 2026-09-15 ## Is CVE-2026-76461 being exploited? CISA added CVE-2026-76461 to the Known Exploited Vulnerabilities catalog on 2026-09-14, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-09-17 under BOD 22-01. Weaponised exploit code for CVE-2026-76461 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 68 in the Threadlinqs vulnerability feed. - [0xBlackash/CVE-2026-76461](https://github.com/0xBlackash/CVE-2026-76461) (github) - [HORKimhab/CVE-2026-76461](https://github.com/HORKimhab/CVE-2026-76461) (github) - [fevar54/CVE-2026-76461-Detection-Kit-](https://github.com/fevar54/CVE-2026-76461-Detection-Kit-) (github) ## Affected products and versions - **Cisco**: Secure Email ## How to fix CVE-2026-76461 Vendor advisory: [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). Because CVE-2026-76461 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-09-17. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2026-76461 1 tracked threat in the Threadlinqs corpus references CVE-2026-76461, either in the campaign’s CVE list or as an indicator on the campaign record. - [CISA Adds Actively Exploited Cisco Secure Email Gateway SQL Injection (CVE-2026-76461) to KEV Catalog](https://intel.threadlinqs.com/threat/TL-2026-2508) — CRITICAL · 2026-09-14 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-09-15. This product uses the NVD API but is not endorsed or certified by the NVD. **Other references** - [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX) Canonical: https://intel.threadlinqs.com/cve/CVE-2026-76461 Full detection coverage and IOCs for threats exploiting CVE-2026-76461 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp