Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability
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.
- Vendor
- Cisco
- Product
- Adaptive Security Appliance (ASA)
- CVSS
- 8.8
- EPSS (exploit probability)
- 87.6%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2016-6366 being exploited?
Yes. CISA added CVE-2016-6366 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 87.6% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2016-6366 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Cisco Adaptive Security Appliance (ASA) CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2014-2120 Cisco Adaptive Security Appliance (ASA) Cross-Site Scripting (XSS) Vulnerability | [ MEDIUM ] | 6.1 | 22.6% | |
| CVE-2016-6367 Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution Vulnerability | [ HIGH ] | 7.8 | 22.6% | |
| CVE-2018-0296 Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability | [ HIGH ] | 7.5 | 99.9% |