CVE-2025-34290

SYSTEM code execution via raced audit-log export

Published Dec 20, 2025 · Updated Dec 20, 2025

Local privilege escalation in Versa SASE Client 7.8.7 through 7.9.4 allows local users to execute code as SYSTEM via audit log export. A privileged Windows service accepts a user-controlled export path without impersonation, then checks and deletes it across a TOCTOU window. Low-privileged access permits symbolic-link and mount-point swaps that redirect deletion to protected directories, enabling MSI rollback execution.

CVSS severity8.5
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Versa SASE Client 7.8.7 through 7.9.4 allows local users to execute code as SYSTEM via audit log export. A privileged Windows service accepts a user-controlled export path without impersonation, then checks and deletes it across a TOCTOU window. Low-privileged access permits symbolic-link and mount-point swaps that redirect deletion to protected directories, enabling MSI rollback execution.

The record

CVE
CVE-2025-34290
Published
Dec 20, 2025
Updated
Dec 20, 2025
Vendor
Versa Networks
Product
Versa SASE Client
Classifications
CWE-250, CWE-367, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.8.7 <7.9.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Versa Networks · Versa SASE Clientversion=7.8.7 <7.9.5

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-250Execution with Unnecessary Privileges
CWE-367Time-of-check Time-of-use Race Condition
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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