How severe is CVE-2013-5557?

CVE-2013-5557 has a CVSS 2.0 base score of 6.3, rated medium severity.

Is CVE-2013-5557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5557?

CVE-2013-5557 affects Cisco Adaptive Security Appliance Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-5557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-5557 published?

CVE-2013-5557 was published on 2015-02-07 and last updated on 2026-06-16.

CVE-2013-5557

CVE-2013-5557 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software with a CVSS 2.0 base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.3)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Adaptive Security Appliance Software
Published: 2015-02-07
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2013-5557?: 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.
How severe is CVE-2013-5557?: CVE-2013-5557 has a CVSS 2.0 base score of 6.3, rated medium severity.
Is CVE-2013-5557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5557?: CVE-2013-5557 affects Cisco Adaptive Security Appliance Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-5557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-5557 published?: CVE-2013-5557 was published on 2015-02-07 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

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