How severe is CVE-2016-1380?

CVE-2016-1380 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-1380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1380?

CVE-2016-1380 primarily affects Cisco Web Security Appliance. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1380?

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-2016-1380 published?

CVE-2016-1380 was published on 2016-05-25 and last updated on 2026-06-17.

CVE-2016-1380

CVE-2016-1380 is a high-severity vulnerability in Cisco Web Security Appliance with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Web Security Appliance
Published: 2016-05-25
Last modified: 2026-06-17

Description

Cisco AsyncOS 8.0 before 8.0.6-119 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (proxy-process hang) via a crafted HTTP POST request, aka Bug ID CSCuo12171.

Frequently asked questions

What is CVE-2016-1380?: Cisco AsyncOS 8.0 before 8.0.6-119 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (proxy-process hang) via a crafted HTTP POST request, aka Bug ID CSCuo12171.
How severe is CVE-2016-1380?: CVE-2016-1380 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-1380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1380?: CVE-2016-1380 primarily affects Cisco Web Security Appliance. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1380?: 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-2016-1380 published?: CVE-2016-1380 was published on 2016-05-25 and last updated on 2026-06-17.

References

Affected products (14)

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:8.0.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.6-078:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.6-119:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.0.7:*:*:*:*:*:*:*
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:8.5.0-000:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.0-497:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.1-021:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.2-024:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.2-027:*:*:*:*:*:*:*
cpe:2.3:a:cisco:web_security_appliance:8.5.3-055:*:*:*:*:*:*:*

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