Is CVE-2013-5474 being actively exploited?

CVE-2013-5474 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-5474?

CVE-2013-5474 has a CVSS 2.0 base score of 7.8 (HIGH).

CVE-2013-5474

HIGH · CVSS 7.8EPSS 1.4%EU EUVD

Race condition in the IPv6 virtual fragmentation reassembly (VFR) implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.3 allows remote attackers to cause a denial of service (device reload or hang) via fragmented IPv6 packets, aka Bug ID CSCud64812.

Key facts

CVSS score: 7.8 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-362
EPSS score: 1.4% (73th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-5314)
Published: September 27, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-5314 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios
cisco / ios
cisco / ios
cisco / ios
cisco / ios
cisco / ios
cisco / ios

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-ipv6vfr(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain