CVE-2023-20178
A public proof of concept exists; no exploitation attested.
- Published2023-06-28
- Fixed in4.10.07061
- WeaknessCWE-276
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established. This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges.
Timeline
dates in UTC- 2023-06-2815:15CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-20178?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-20178?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.10 | < 4.10.07061 | 4.10.07061 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.0 | < 5.0.02075 | 5.0.02075 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Cisco anyconnect secure mobility client to 4.10.07061
Advisories and patches
- sec.cloudapps.cisco.comVendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- CISA-ADPSSVC decisionnone2026-10-08
- OpenCVESSVC decisionnone—
- CNACVSS 3.17.8read 2026-10-23
- NVDCVSS 3.17.8read 2026-10-23
- CNAweakness (CWE)CWE-276read 2026-10-23
- NVDweakness (CWE)CWE-276read 2026-10-23
- FIRST EPSSEPSS score5.4 %2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2023-06-28
- Last Modified
- 2026-10-08
- NVD status
- Modified
Frequently asked questions
What is CVE-2023-20178?
Is CVE-2023-20178 actively exploited?
What is the CVSS score for CVE-2023-20178?
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