Multiple vulnerabilities in the Application Layer Protocol Inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerabilities are due to logical errors during traffic inspection. An attacker could exploit these vulnerabilities by sending a high volume of malicious traffic across an affected device. An exploit could allow the attacker to cause a deadlock condition, resulting in a reload of an affected device. These vulnerabilities affect Cisco ASA Software and Cisco FTD Software configured for Application Layer Protocol Inspection running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCve61540, CSCvh23085, CSCvh95456.
CVE-2018-0240
Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.6; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.6
- EG Score
- 8.6(medium)
- EPSS
- 88.9%
- KEV
- Not listed
Published
April 19, 2018
Last Modified
November 21, 2024
References (8)
- psirt@ciscohttp://www.securityfocus.com/bid/103934
- psirt@ciscohttp://www.securitytracker.com/id/1040722
- psirt@ciscohttps://ics-cert.us-cert.gov/advisories/ICSA-18-184-01
- psirt@ciscohttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-asa_inspect
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/103934
- af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1040722
- af854a3a-2127-422b-91ae-364da2661108https://ics-cert.us-cert.gov/advisories/ICSA-18-184-01
- af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-asa_inspect
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 39× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-28 08:48 UTCGHSA enrichment
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- 2026-05-25 08:46 UTCOSV refresh
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