CVE security advisories and vulnerability history for ios by cisco.
Last updated
cisco ios has 625 published CVE records since 1999, of which 38 are in CISA's Known Exploited Vulnerabilities catalog and 67 have a known public exploit. The average CVSS base score across scored CVEs is 7.5.
This page aggregates every publicly disclosed vulnerability (CVE) affecting cisco ios, with a severity breakdown, the affected and patched versions, the most common weakness types, and the full CVE list.
How the CVSS severity of cisco ios's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.
478 additional CVEs have no CVSS severity score.
In CISA’s Known Exploited Vulnerabilities catalog
38
38 of cisco ios's CVEs are confirmed exploited in the wild.
Public exploits
67
67 of cisco ios's CVEs have a known public exploit available.
Browse every cisco ios version named in a CVE, then pick one to see only the CVEs that affect it.
625 CVEs
Added to CISA KEV 2025-09-29
Showing 30 of 625
The CWE weakness categories most often found in cisco ios CVEs. Follow any weakness for its full explanation.
How many cisco ios CVEs were published each year.
Browse vulnerabilities for other products by cisco.
Common questions about cisco ios vulnerabilities.
cisco ios has 625 published CVE records since 1999.
Yes — 38 of cisco ios's CVEs are listed in CISA's Known Exploited Vulnerabilities catalog, confirmed exploited in the wild and carrying a CISA remediation deadline.
Yes — 67 of cisco ios's CVEs have a known public exploit.
3,714 distinct cisco ios versions are named across its CVEs. Use the version filter above to see the CVEs affecting a specific version.
cisco ios's CVEs most often map to these CWE weakness types: CWE-20 (Improper Input Validation), CWE-399, CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')).
cisco ios has 14 critical and 85 high-severity CVEs.
The average CVSS base score across cisco ios's scored CVEs is 7.5.
Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.
Monitor new cisco ios vulnerabilities as they are disclosed, with AI-written analysis and remediation guidance.
