CVEs / CVE-2026-76461
CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability
- Known exploited in the CISA KEV catalog since 14 Sep 2026
- critical 9.8 CVSS 3.1 (from the CNA)
- EPSS 29.5% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
Description
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Cisco Cisco Secure Email | 14.0.0-698 | — |
| Cisco Cisco Secure Email | 13.5.1-277 | — |
| Cisco Cisco Secure Email | 13.0.0-392 | — |
| Cisco Cisco Secure Email | 14.2.0-620 | — |
| Cisco Cisco Secure Email | 13.0.5-007 | — |
| Cisco Cisco Secure Email | 13.5.4-038 | — |
| Cisco Cisco Secure Email | 14.2.1-020 | — |
| Cisco Cisco Secure Email | 14.3.0-032 | — |
| Cisco Cisco Secure Email | 15.0.0-104 | — |
| Cisco Cisco Secure Email | 15.0.1-030 | — |
| Cisco Cisco Secure Email | 15.5.0-048 | — |
| Cisco Cisco Secure Email | 15.5.1-055 | — |
| Cisco Cisco Secure Email | 15.5.2-018 | — |
| Cisco Cisco Secure Email | 16.0.0-050 | — |
| Cisco Cisco Secure Email | 15.0.3-002 | — |
| Cisco Cisco Secure Email | 16.0.0-054 | — |
| Cisco Cisco Secure Email | 15.5.3-022 | — |
| Cisco Cisco Secure Email | 16.0.1-017 | — |
| Cisco Cisco Secure Email | 15.5.4-012 | — |
| Cisco Cisco Secure Email | 16.0.4-016 | — |
| Cisco Cisco Secure Email | 15.0.5-016 | — |
| Cisco Cisco Secure Email | 16.0.2-112 | — |
| Cisco Cisco Secure Email | 16.0.3-044 | — |
Exploitation
| In CISA KEV since | 14 Sep 2026 |
|---|---|
| Due date for US federal agencies | 17 Sep 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | 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. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-89 |
References
- CVE-2026-76461 on NVD
- CVE-2026-76461 in the CISA KEV catalog
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76461 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.