Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability
Cisco Adaptive Security Appliance (ASA) contains an improper input validation vulnerability with HTTP URLs. Exploitation could allow an attacker to cause a denial-of-service (DoS) condition or information disclosure.
- Vendor
- Cisco
- Product
- Adaptive Security Appliance (ASA)
- CVSS
- 7.5
- EPSS (exploit probability)
- 99.9%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2018-0296 being exploited?
Yes. CISA added CVE-2018-0296 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 99.9% (scored October 25, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2018-0296 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 (181 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-2016-6366 Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability | [ HIGH ] | 8.8 | 87.6% |