CVE-2013-5546: Cisco Asr 1001

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

The TCP reassembly feature in Cisco IOS XE 3.7 before 3.7.3S and 3.8 before 3.8.1S on 1000 ASR devices allows remote attackers to cause a denial of service (device reload) via large TCP packets that are processed by the (1) NAT or (2) ALG component, aka Bug ID CSCud72509.

Affected products

• Cisco Asr 1001
• Cisco Asr 1002
• Cisco Asr 1002-X
• Cisco Asr 1004
• Cisco Asr 1006
• Cisco Asr 1023 Router
• Cisco IOS XE: version 3.7.0s only; version 3.7.1s only; version 3.7.2s only; version 3.8.0s only

Published 2013-10-31. Last modified 2026-06-16.