CVE-2026-20291
Cisco · Cisco Cyber Vision, Cisco Open Source Snort3, Cisco Secure Firewall Threat Defense (FTD) Software
Cisco
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SECURITY ALERT
CVE
CVE-2026-20291
CriticalCVSS —
VendorCisco
ProductCisco Cyber Vision, Cisco Open Source Snort3, Cisco Secure Firewall Threat Defense (FTD) Software
Recommended action
Apply the security updates or mitigations listed in the vendor's official advisory.
Published21-10-2026
SourceCisco PSIRT
SECURE
INFRASTRUCTURE
INFRASTRUCTURE
OPTIMIZED
NETWORKS
NETWORKS
BUSINESS
CONTINUITY
CONTINUITY
TRUSTED
PARTNER
PARTNER
MANAR TECHwww.manartech.com
About this alert
A vulnerability tracked as CVE-2026-20291 affects Cisco Cyber Vision, Cisco Open Source Snort3, Cisco Secure Firewall Threat Defense (FTD) Software from Cisco. Severity: Critical. Organizations running the affected product should review the official advisory and apply the recommended action.
- Severity
- Critical
- CVSS
- Not yet rated
- Vendor
- Cisco
- Product
- Cisco Cyber Vision, Cisco Open Source Snort3, Cisco Secure Firewall Threat Defense (FTD) Software
- Published
- 21-10-2026
- Source
- Cisco PSIRT
- Recommended action
- Apply the security updates or mitigations listed in the vendor's official advisory.