CVE-2025-23010
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn Improper Link Resolution Before File Access ('Link Following') vulnerability in SonicWall NetExtender Windows (32 and 64 bit) client which allows an attacker to manipulate file paths.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA link following (symbolic link manipulation) vulnerability in SonicWall NetExtender Windows client allows local attackers to manipulate file paths, potentially enabling privilege escalation or unauthorized file access. The vulnerability stems from improper validation of file paths before access, likely involving time-of-check to time-of-use (TOCTOU) conditions in file operations.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Physical
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify NetExtender installationCheck if SonicWall NetExtender client is installed by searching for the program in Add/Remove Programs, or look for installation directories such as C:\Program Files\SonicWall\NetExtender or C:\Program Files (x86)\SonicWall\NetExtenderAffected if NetExtender is installed on the system
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Determine NetExtender versionOpen Programs and Features in Control Panel, find SonicWall NetExtender in the list, and note the version column. Alternatively, check the version of NexExtender.exe in the installation folder by right-clicking the file and selecting Properties > DetailsAffected if The installed version is any version of NetExtender for Windows prior to vendor patch release addressing CVE-2025-23010
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Confirm NetExtender service runs with elevated privilegesOpen Services (services.msc), locate the NetExtender service, right-click and select Properties, and check the Log On account. Also verify if the service runs as LocalSystem or an administrator accountAffected if The NetExtender service runs with elevated privileges such as LocalSystem or a domain administrator account
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Inspect NetExtender directory permissionsRight-click the NetExtender installation folder (typically in Program Files), select Properties > Security, and review which users and groups have write or modify permissions to the folder and its subdirectoriesAffected if Non-administrative local users have write or modify permissions to NetExtender installation directories or temp folders used by the application
A system is affected if SonicWall NetExtender for Windows is installed and runs with elevated privileges while allowing local users write access to application directories, creating conditions for symbolic link manipulation and potential privilege escalation.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor patches when available; until then, restrict local user permissions and monitor NetExtender file/folder activity for unauthorized access attempts. Ensure NetExtender runs with minimum necessary privileges.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-23010 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-23010 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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