How severe is CVE-2015-6293?

CVE-2015-6293 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2015-6293 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-2015-6293?

CVE-2015-6293 primarily affects Cisco Web Security Appliance. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6293?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6293 published?

CVE-2015-6293 was published on 2015-11-06 and last updated on 2026-06-17.

CVE-2015-6293

CVE-2015-6293 is a high-severity vulnerability in Cisco Web Security Appliance with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Web Security Appliance
Published: 2015-11-06
Last modified: 2026-06-17

Description

Cisco AsyncOS 8.x before 8.0.8-113, 8.1.x and 8.5.x before 8.5.3-051, 8.6.x and 8.7.x before 8.7.0-171-LD, and 8.8.x before 8.8.0-085 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via multiple file-range requests, aka Bug ID CSCur39155.

Frequently asked questions

What is CVE-2015-6293?: Cisco AsyncOS 8.x before 8.0.8-113, 8.1.x and 8.5.x before 8.5.3-051, 8.6.x and 8.7.x before 8.7.0-171-LD, and 8.8.x before 8.8.0-085 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via multiple file-range requests, aka Bug ID CSCur39155.
How severe is CVE-2015-6293?: CVE-2015-6293 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2015-6293 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-2015-6293?: CVE-2015-6293 primarily affects Cisco Web Security Appliance. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-6293 published?: CVE-2015-6293 was published on 2015-11-06 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:cisco:web_security_appliance:8.0.0-000:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.5:hp1:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.6-078:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.7-142:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.8-mr-113:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.0-497:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.0.000:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.2-024:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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