Is CVE-2011-2059 being actively exploited?

CVE-2011-2059 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-2059?

CVE-2011-2059 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2011-2059

MEDIUM · CVSS 5.0EPSS 1.6%EU EUVD

The ipv6 component in Cisco IOS before 15.1(4)M1.3 allows remote attackers to conduct fingerprinting attacks and obtain potentially sensitive information about the presence of the IOS operating system via an ICMPv6 Echo Request packet containing a Hop-by-Hop (HBH) extension header (EH) with a 0x0c01050c value in the PadN option data, aka Bug ID CSCtq02219.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 1.6% (75th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-2053)
Published: October 22, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-2053 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios

References

http://blogs.cisco.com/security/1999tcp-redux-the-ipv6-flavor(Broken Link)
http://tools.cisco.com/security/center/viewIpsSignature.x?signatureId=36606&signatureSubId=0(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