CVE-2011-3274

6.1 MEDIUM 0.7% exploit odds Fix listed

What it is

Unspecified vulnerability in Cisco IOS 12.2SRE before 12.2(33)SRE4, 15.0, and 15.1, and IOS XE 2.1.x through 3.3.x, when an MPLS domain is configured, allows remote attackers to cause a denial of service (device crash) via a crafted IPv6 packet, related to an expired MPLS TTL, aka Bug ID CSCto07919.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of service disruption.
Exploit odds: 0.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2011-10-03 23:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:33 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.7% in the next 30 days (EPSS).
Severity: 6.1 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2011-10-03 23:55 UTC
Last modified: 2026-06-16 23:33 UTC
Exploit probability: 0.7% · EPSS, next 30 days
Record status: Modified

Affected

Cisco iOS 12.2\(33\)sre
Cisco iOS 12.2\(33\)sre0a
Cisco iOS 12.2\(33\)sre1
Cisco iOS 12.2\(33\)sre2
Cisco iOS 12.2\(33\)sre3
Cisco iOS 12.2sre
Cisco iOS 15.0
Cisco iOS 15.1

Attack profile CVSS 2.0 · 6.1

Attack vector: Adjacent network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record