Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2016-6366

CVE-2016-6366HIGH

n/a n/a — Cisco Adaptive Security Appliance (ASA)

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  H  H    8.8   .8757   99.8   YES

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Jul 26  Reserved by cisco
  Aug 18  Published (CNA: cisco)
  May 24  Added to CISA KEV, remediation due 2022-06-14

CWE-120 · CNA: cisco · CVSS v3.1 · 9 references · KEV due June 14, 2022

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 26, 2016	Reserved	Reserved by cisco
August 18, 2016	Published	Published (CNA: cisco)
May 24, 2022	KEV ADDED	Added to CISA KEV, remediation due 2022-06-14

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-120

References (9)

http://blogs.cisco.com/security/shadow-brokers [x_refsource_CONFIRM]
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp [vendor-advisory, x_refsource_CISCO]
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516 [x_refsource_CONFIRM]
http://www.securityfocus.com/bid/92521 [vdb-entry, x_refsource_BID]
http://www.securitytracker.com/id/1036637 [vdb-entry, x_refsource_SECTRACK]
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip [x_refsource_MISC]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6366 [government-resource]
https://www.exploit-db.com/exploits/40258/ [exploit, x_refsource_EXPLOIT-DB]
https://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html [x_refsource_MISC]

Authoritative record: CVE-2016-6366 at cve.org

Weaknesses: CWE-120

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2016-6366 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.