Is CVE-2016-6366 actively exploited?

CVE-2016-6366 has no public evidence of in-the-wild exploitation as of 2026-01-12.

What is the CVSS score for CVE-2016-6366?

CVE-2016-6366 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2016-6366?

Patch guidance is available from cisco security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2016-6366.

Fix CVE-2016-6366 - HIGH cisco pix firewall software

Q: Which products are affected by CVE-2016-6366?

10 products: cisco pix firewall software, cisco adaptive security appliance software, cisco adaptive security appliance software, cisco adaptive security appliance software, cisco adaptive security appliance software, and 5 more.

Description

Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-120 CWE-120

Metadata

Primary Vendor: CISCO
Published: 8/18/2016
Last Modified: 1/12/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cisco : pix_firewall_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : adaptive_security_appliance_softwarecisco : asa_1000v_cloud_firewall_softwarecisco : asa_1000v_cloud_firewall_software

Remediation Guidance

Executive Summary

View on NIST NVD