CVE-2025-29808
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 · uneditedUse of a cryptographic primitive with a risky implementation in Windows Cryptographic Services allows an authorized attacker to disclose information locally.
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 confidenceThis vulnerability in Windows Cryptographic Services involves a risky cryptographic primitive implementation that allows an authorized local attacker to disclose sensitive information. The flaw enables privilege escalation through cryptographic weakness rather than direct code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 10.0.20348.3453CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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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Check Windows Server 2022 build versionOpen Command Prompt or PowerShell and run: winver or systeminfo | findstr /B /C:"OS Version"Affected if The build version is lower than 10.0.20348.3453 (for example, 10.0.20348.xxxx where xxxx < 3453)
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Verify Windows Cryptographic Services statusOpen Services console (services.msc) or run: Get-Service | Where-Object {$_.DisplayName -like "*Cryptographic*"}Affected if Cryptographic Services are running and the Windows build version is below 10.0.20348.3453
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Check for recent security updates installedRun: Get-HotFix | Where-Object {$_.Description -eq "Security Update"} | Sort-Object InstalledOn -Descending | Select-Object -First 10Affected if No security update with KB identifier related to CVE-2025-29808 is installed and the build version is below 10.0.20348.3453
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Verify Windows version via PowerShell programmaticallyRun: [System.Environment]::OSVersion.Version or (Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion").CurrentBuildNumberAffected if The version returns a build number lower than 20348.3453
A system is affected if it runs Windows Server 2022 with a build version below 10.0.20348.3453 and has Windows Cryptographic Services enabled.
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.
dbcve · scoped10.0.20348.3453
Apply Microsoft security updates for CVE-2025-29808 to patch the Windows Cryptographic Services vulnerability. Prioritize systems handling sensitive cryptographic operations.
Windows Server 2022 version 10.0.20348.3453 or later (apply latest monthly security update)
- Check current Windows Server 2022 version by running 'winver' or 'systeminfo' in Command Prompt
- Open Settings > Update & Security > Windows Update, or run 'ms-settings:windowsupdate'
- Click 'Check for updates' to download and install the latest security updates
- Ensure the installed build is version 10.0.20348.3453 or higher (e.g., subsequent monthly updates like 10.0.20348.3500+)
- Restart the server to complete the update process
- Verify the new version by running 'winver' again
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-29808 — 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-2025-29808 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data