Unrated severityNVD Advisory· Published Oct 3, 2011· Updated Jun 16, 2026
CVE-2011-3279
CVE-2011-3279
Description
The provider-edge MPLS NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (device reload) via a malformed SIP packet to UDP port 5060, aka Bug ID CSCti98219.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*range: >=12.1,<=12.4
- (no CPE)range: >=12.1, <=12.4 or >=15.0, <=15.1
cpe:2.3:o:cisco:ios_xe:3.1.0sg:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:cisco:ios_xe:3.1.0sg:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:3.1.1sg:*:*:*:*:*:*:*
- (no CPE)range: 3.1.xSG
Patches
Vulnerability mechanics
References
3- tools.cisco.com/security/center/viewAlert.xnvdVendor Advisory
- www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtmlnvdVendor Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781nvdThird Party Advisory
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