CVEvulnerability

CVE-2016-6366

8.8 HIGH Known exploited Published 2016-08-18 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability — Cisco Adaptive Security Appliance (ASA)

A buffer overflow vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASA software could allow an attacker to cause a reload of the affected system or to remotely execute code.

Added to KEV: 2022-05-24
Remediation due: 2022-06-14
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2016-6366

Status: Analyzed
Published: 2016-08-18
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 8.5 HIGH — AV:N/AC:M/Au:S/C:C/I:C/A:C
Weaknesses: CWE-120

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.

Affected configurations

• cisco pix firewall software • cisco adaptive security appliance software (>= 7.2.1 < 9.0.4.40) • cisco adaptive security appliance software (>= 9.1.1 < 9.1.7\(9\)) • cisco adaptive security appliance software (>= 9.2.0 < 9.2.4\(14\)) • cisco adaptive security appliance software (>= 9.3.0 < 9.3.3\(10\)) • cisco adaptive security appliance software (>= 9.4.0.115 < 9.4.3\(8\)) • cisco adaptive security appliance software (>= 9.5.0 <= 9.5\(3\)) • cisco adaptive security appliance software (>= 9.6.0 < 9.6.1\(11\)) • cisco asa 1000v cloud firewall software 8.7.1 • cisco asa 1000v cloud firewall software 8.7.1.1

Weakness · CWE (1)

CWE-120 Buffer Copy without Checking Size of Input weakness

References

http://blogs.cisco.com/security/shadow-brokers Exploit, Press/Media Coverage, Vendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp Vendor Advisory
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516 Vendor Advisory
http://www.securityfocus.com/bid/92521 Broken Link, Not Applicable, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036637 Broken Link, Third Party Advisory, VDB Entry
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip Broken Link, Exploit
https://www.exploit-db.com/exploits/40258/ Third Party Advisory, VDB Entry
https://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html Exploit, Technical Description
http://blogs.cisco.com/security/shadow-brokers Exploit, Press/Media Coverage, Vendor Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp Vendor Advisory
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-56516 Vendor Advisory
http://www.securityfocus.com/bid/92521 Broken Link, Not Applicable, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036637 Broken Link, Third Party Advisory, VDB Entry
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40258.zip Broken Link, Exploit
https://www.exploit-db.com/exploits/40258/ Third Party Advisory, VDB Entry
https://zerosum0x0.blogspot.com/2016/09/reverse-engineering-cisco-asa-for.html Exploit, Technical Description
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6366 US Government Resource