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CVE-2013-5557

23
FAUCET Score

CVE-2013-5557 describes a denial-of-service vulnerability in the Proxy Bypass Content Rewriter feature of Cisco Adaptive Security Appliance (ASA) Software versions 9.1(.2) and earlier. An authenticated remote attacker can trigger a device crash or error-recovery event by sending a crafted HTTP request that initiates a rewrite. With a CVSS score of 6.3, this vulnerability has a network attack vector, medium attack complexity, and high impact on availability. There is no known exploit intelligence, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9.1\(2\)CPE matchmatch criteria
cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.3MEDIUM

AV:N/AC:M/Au:S/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.01%
Probability of exploitation in next 30 days
EPSS Percentile
78.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0201 is in the 85th percentile among its peer group of 1,428 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

exchange.xforce.ibmcloud.com / vulnerabilities/100694
Third Party AdvisoryVDB Entry
tools.cisco.com / security/center/content/CiscoSecurityNotice/CVE-2013-5557
Broken LinkVendor Advisory
tools.cisco.com / security/center/viewAlert.x
Vendor Advisory
securityfocus.com / bid/72529
Third Party AdvisoryVDB Entry