Unauthenticated SQL injection enabling root command execution in Cisco Secure Email Gateway — widely deployed, CISA KEV, CVSS 9.8; enterprise-wide disruption likely.
CVE-2026-76461
Unauthenticated SQL injection in Cisco Secure Email Gateway enabling root RCE
Is CVE-2026-76461 being exploited?
Yes. CVE-2026-76461 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-76461?
CVE-2026-76461 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-76461?
Yes. A fix has been recorded for CVE-2026-76461. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-76461 affect?
CVE-2026-76461 affects Cisco Secure Email Gateway (AsyncOS). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-76461?
Apply Cisco mitigations, isolate internet-facing SEGs, monitor logs, and patch when vendor fixes are released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted email triggers SQL injection allowing arbitrary SQL and escalation to root command execution on the appliance OS.
Immediate action required
- affected14.0.0-698
- affected13.5.1-277
- affected13.0.0-392
- affected14.2.0-620
- affected13.0.5-007
- affected13.5.4-038
- affected14.2.1-020
- affected14.3.0-032
- affected15.0.0-104
- affected15.0.1-030
- affected15.5.0-048
- affected15.5.1-055
- affected15.5.2-018
- affected16.0.0-050
- affected15.0.3-002
- affected16.0.0-054
- affected15.5.3-022
- affected16.0.1-017
- affected15.5.4-012
- affected16.0.4-016
- affected15.0.5-016
- affected16.0.2-112
- affected16.0.3-044
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.