CVE-2025-20182
Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software and IOS XE Software IKEv2 Denial of Service Vulnerability
- 8.6HighCVSS base score
- 0.56%Exploitation in 30 daysEPSS · top 53% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation when processing IKEv2 messages. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition on the affected device.
Timeline
ID reserved
By cisco
- 7 months later
· 7 months later
Published
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 |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.56% · top 53% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
Cisco · Cisco Adaptive Security Appliance (ASA) Software
- affected 9.12.3
- affected 9.8.3
- affected 9.12.1
- affected 9.8.1
- affected 9.12.2
- affected 9.8.2.45
- affected 9.8.2
- affected 9.8.4
- affected 9.14.1
- affected 9.12.4
- affected 9.8.2.26
- affected 9.8.2.24
- affected 9.8.2.15
- affected 9.8.2.14
- affected 9.8.2.35
- affected 9.8.2.20
- affected 9.8.2.8
- affected 9.8.2.17
- affected 9.8.2.28
- affected 9.8.2.33
- affected 9.8.2.38
- affected 9.8.4.25
- affected 9.12.3.2
- affected 9.12.3.7
- affected 9.8.3.18
- affected 9.8.3.14
- affected 9.8.4.15
- affected 9.8.4.8
- affected 9.8.1.7
- affected 9.8.3.29
- affected 9.14.1.10
- affected 9.12.2.5
- affected 9.8.4.22
- affected 9.12.3.12
- affected 9.8.4.7
- affected 9.8.4.17
- affected 9.8.3.16
- affected 9.8.4.20
- affected 9.8.3.11
- affected 9.12.1.3
- and 153 more
Cisco · Cisco Firepower Threat Defense Software
- affected 6.2.3.14
- affected 6.4.0.1
- affected 6.2.3.7
- affected 6.2.3
- affected 6.4.0.2
- affected 6.2.3.9
- affected 6.2.3.1
- affected 6.2.3.2
- affected 6.4.0.5
- affected 6.2.3.10
- affected 6.4.0
- affected 6.4.0.3
- affected 6.2.3.6
- affected 6.4.0.4
- affected 6.2.3.15
- affected 6.2.3.5
- affected 6.2.3.4
- affected 6.2.3.3
- affected 6.2.3.8
- affected 6.4.0.6
- affected 6.2.3.11
- affected 6.2.3.12
- affected 6.2.3.13
- affected 6.4.0.7
- affected 6.4.0.8
- affected 6.6.0
- affected 6.4.0.9
- affected 6.2.3.16
- affected 6.6.0.1
- affected 6.6.1
- affected 6.4.0.10
- affected 6.4.0.11
- affected 6.6.3
- affected 6.6.4
- affected 6.4.0.12
- affected 7.0.0
- affected 6.2.3.17
- affected 7.0.0.1
- affected 6.6.5
- affected 7.0.1
- and 46 more
What to do
Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
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)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-13923 (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-2025-20182)Record last updated .