CVE-2016-6366
Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA…
- Published
- Updated
- Reserved
- Assigned by
- cisco
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability.
- Added
- 24 May 2022
- Fix due (US federal)
- 14 Jun 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
- 40258 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Timeline
ID reserved
By cisco
- 23 days later
· 23 days later
Published
- 6 years later
· 6 years later
Added to CISA KEV
Known exploited in the wild
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 87.6% · top 0.2% of all CVEs (8 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
n/a
- affected n/a
References (9)
- 92521 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip (opens in a new tab)x_refsource_MISCx_transferred
- http://blogs.cisco.com/security/shadow-brokers (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20160817 Cisco Adaptive Security Appliance SNMP Remote Code Execution Vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html (opens in a new tab)x_refsource_MISCx_transferred
- 40258 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 1036637 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6366 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-6366)Record last updated .