CVE-2023-20095A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense…
- 8.6HighCVSS base score
- 0.85%Exploitation in 30 daysEPSS · top 41% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of HTTPS requests. An attacker could exploit this vulnerability by sending crafted HTTPS requests to an affected system. A successful exploit could allow the attacker to cause resource exhaustion, resulting in a DoS condition.
Timeline
ID reserved
By cisco
- 12 months later
· 12 months later
Published
- 9 months later
· 9 months later
Record updated
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 · Modified | 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)
- 0.85% · top 41% of all CVEs (13 Nov 2026)
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 9.8.1
- affected 9.8.1.5
- affected 9.8.1.7
- affected 9.8.2
- affected 9.8.2.8
- affected 9.8.2.14
- affected 9.8.2.15
- affected 9.8.2.17
- affected 9.8.2.20
- affected 9.8.2.24
- affected 9.8.2.26
- affected 9.8.2.28
- affected 9.8.2.33
- affected 9.8.2.35
- affected 9.8.2.38
- affected 9.8.3.8
- affected 9.8.3.11
- affected 9.8.3.14
- affected 9.8.3.16
- affected 9.8.3.18
- affected 9.8.3.21
- affected 9.8.3
- affected 9.8.3.26
- affected 9.8.3.29
- affected 9.8.4
- affected 9.8.4.3
- affected 9.8.4.7
- affected 9.8.4.8
- affected 9.8.4.10
- affected 9.8.4.12
- affected 9.8.4.15
- affected 9.8.4.17
- affected 9.8.4.25
- affected 9.8.4.20
- affected 9.8.4.22
- affected 9.8.4.26
- affected 9.8.4.29
- affected 9.8.4.32
- affected 9.8.4.33
- affected 9.8.4.34
- and 82 more
Cisco · Cisco Firepower Threat Defense Software
- affected 6.2.3
- affected 6.2.3.1
- affected 6.2.3.2
- affected 6.2.3.3
- affected 6.2.3.4
- affected 6.2.3.5
- affected 6.2.3.6
- affected 6.2.3.7
- affected 6.2.3.8
- affected 6.2.3.10
- affected 6.2.3.11
- affected 6.2.3.9
- affected 6.2.3.12
- affected 6.2.3.13
- affected 6.2.3.14
- affected 6.2.3.15
- affected 6.2.3.16
- affected 6.2.3.17
- affected 6.2.3.18
- affected 6.6.0
- affected 6.6.0.1
- affected 6.6.1
- affected 6.6.3
- affected 6.6.4
- affected 6.6.5
- affected 6.6.5.1
- affected 6.6.5.2
- affected 6.4.0
- affected 6.4.0.1
- affected 6.4.0.3
- affected 6.4.0.2
- affected 6.4.0.4
- affected 6.4.0.5
- affected 6.4.0.6
- affected 6.4.0.7
- affected 6.4.0.8
- affected 6.4.0.9
- affected 6.4.0.10
- affected 6.4.0.11
- affected 6.4.0.12
- and 19 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
References1
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-2023-24274 (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-2023-20095)Record last updated .