CVE-2025-34290: Versa Networks SASE Client for Windows · Execution with Unnecessary Privileges
Affects Versa Networks SASE Client for WindowsSource CVE Database V5
Not known to be exploited · CVSS 8.5 High.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Versa Networks SASE Client for Windows | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2025-34290, European organizations should take the following specific actions: 1) Immediately identify and inventory all Windows endpoints running affected versions (7.8.7 through 7.9.4) of the Versa SASE Client. 3) Restrict local user privileges to the minimum necessary, preventing untrusted users from having authenticated local access to systems running the client. 4) Implement application whitelisting and endpoint detection and response (EDR) solutions to monitor and block suspicious file system operations, particularly those involving symbolic links or deletion of protected directories. 5) Enforce strict file system permissions on critical system folders like C:\Config.msi to prevent unauthorized modifications. 6) Conduct regular audits of local user accounts and remove or disable unnecessary accounts to reduce the attack surface. 7) Educate IT and security teams about the risk of TOCTOU race conditions and the importance of privilege separation in software design. 8) Monitor logs for unusual activity related to the audit log export functionality or unexpected deletions of system files. These targeted measures go beyond generic advice by focusing on the vulnerability’s exploitation vector and the specific behavior of the Versa SASE Client.
Description
Versa SASE Client for Windows versions released between 7.8.7 and 7.9.4 contain a local privilege escalation vulnerability in the audit log export functionality. The client communicates user-controlled file paths to a privileged service, which performs file system operations without impersonating the requesting user. Due to improper privilege handling and a time-of-check time-of-use race condition combined with symbolic link and mount point manipulation, a local authenticated attacker can coerce the service into deleting arbitrary directories with SYSTEM privileges. This can be exploited to delete protected system folders such as C:\\Config.msi and subsequently achieve execution as NT AUTHORITY\\SYSTEM via MSI rollback techniques.