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CVE-2016-6366 Cisco CVE debrief

CVE-2016-6366 is a Cisco Adaptive Security Appliance (ASA) SNMP buffer overflow vulnerability that CISA has listed in its Known Exploited Vulnerabilities catalog. Because CISA marked it as known to be exploited in the wild, organizations should treat Cisco ASA devices as a priority for review, patching, and exposure reduction.

Vendor
Cisco
Product
Adaptive Security Appliance (ASA)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-05-24
Original CVE updated
2022-05-24
Advisory published
2022-05-24
Advisory updated
2022-05-24

Who should care

Administrators and security teams responsible for Cisco ASA appliances, especially environments where ASA devices are internet-facing or provide remote access, VPN, or perimeter security functions.

Technical summary

The supplied source corpus identifies this issue as an SNMP buffer overflow in Cisco Adaptive Security Appliance (ASA). The CISA KEV entry indicates the vulnerability is known to be exploited and directs operators to apply updates per vendor instructions. The corpus does not provide additional technical details such as affected versions, exploit conditions, or impact scope, so those should be confirmed through the official Cisco and NVD records.

Defensive priority

High. CISA added this vulnerability to the Known Exploited Vulnerabilities catalog, which means it has been observed in active exploitation and should be prioritized for remediation.

Recommended defensive actions

  • Apply Cisco updates per vendor instructions as soon as possible.
  • Inventory all Cisco ASA devices and confirm which instances are exposed to untrusted networks.
  • Prioritize remediation for internet-facing ASA appliances and systems used for remote access or perimeter defense.
  • Review Cisco and NVD official records for version-specific guidance and any compensating controls.
  • Check device logs and related security telemetry for signs of suspicious SNMP activity or compromise.
  • If patching cannot be completed immediately, reduce exposure by restricting access to management and SNMP-related services wherever operationally feasible.

Evidence notes

This debrief is grounded in the supplied CISA KEV entry and the official reference links provided for CVE-2016-6366. The source item states the vulnerability name, product, KEV inclusion date, due date, and the required action: apply updates per vendor instructions. The corpus does not include the full Cisco advisory or the NVD record content, so no additional technical claims are made beyond the supplied metadata.

Official resources

CISA added CVE-2016-6366 to the Known Exploited Vulnerabilities catalog on 2022-05-24 and set a due date of 2022-06-14. The supplied corpus does not include the original Cisco disclosure date or a vendor advisory publication date.