CVE-2022-20928A vulnerability in the authentication and authorization flows for VPN connections in Cisco Adaptive Security Appliance (ASA) Software and…
- 5.8MediumCVSS base score
- 0.83%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in the authentication and authorization flows for VPN connections in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to establish a connection as a different user. This vulnerability is due to a flaw in the authorization verifications during the VPN authentication flow. An attacker could exploit this vulnerability by sending a crafted packet during a VPN authentication. The attacker must have valid credentials to establish a VPN connection. A successful exploit could allow the attacker to establish a VPN connection with access privileges from a different user.
Timeline
ID reserved
By cisco
- 12 months later
· 12 months later
Published
- 21 months later
· 21 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 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.83% · top 42% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.
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 74 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 13 more
Cisco · Cisco FirePOWER Services Software for ASA
- affected N/A
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-2022-26178 (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-2022-20928)Record last updated .