CVE-2013-5557: Cisco Adaptive Security Appliance Software

Medium severity, CVSS 6.3. EPSS: 2% chance of exploitation in the next 30 days.

The Proxy Bypass Content Rewriter feature in the WebVPN subsystem in Cisco Adaptive Security Appliance (ASA) Software 9.1(.2) and earlier allows remote authenticated users to cause a denial of service (device crash or error-recovery event) via an HTTP request that triggers a rewrite, aka Bug ID CSCug91577.

Affected products

• Cisco Adaptive Security Appliance Software: up to and including 9.1\(2\)

Published 2015-02-07. Last modified 2026-06-16.