Is CVE-2011-4016 being actively exploited?

CVE-2011-4016 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-4016?

CVE-2011-4016 has a CVSS 2.0 base score of 5.4 (MEDIUM).

CVE-2011-4016

MEDIUM · CVSS 5.4EPSS 1.3%EU EUVD

The PPP implementation in Cisco IOS 12.2 and 15.0 through 15.2, when Point-to-Point Termination and Aggregation (PTA) and L2TP are used, allows remote attackers to cause a denial of service (device crash) via crafted network traffic, aka Bug ID CSCtf71673.

Key facts

CVSS score: 5.4 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:H/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-20
EPSS score: 1.3% (71th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-3969)
Published: May 2, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-3969 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

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

References

http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-2TCAVS.html(Release Notes, Vendor Advisory)
http://www.securitytracker.com/id?1027005(Third Party Advisory, VDB Entry)

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

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