CVE-2013-1166: Cisco Asr 1001

High severity, CVSS 7.8. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco IOS XE 3.2 through 3.4 before 3.4.5S, and 3.5 through 3.7 before 3.7.1S, on 1000 series Aggregation Services Routers (ASR), when VRF-aware NAT and SIP ALG are enabled, allows remote attackers to cause a denial of service (card reload) by sending many SIP packets, aka Bug ID CSCuc65609.

Affected products

• Cisco Asr 1001
• Cisco Asr 1002
• Cisco Asr 1002-X
• Cisco Asr 1002 Fixed Router
• Cisco Asr 1004
• Cisco Asr 1006
• Cisco Asr 1023 Router
• Cisco IOS XE: version 3.2.0s only; version 3.2.1s only; version 3.2.2s only; version 3.3.0s only; version 3.3.1s only; version 3.3.2s only; …

Published 2013-04-11. Last modified 2026-06-16.