CVE-2025-29815
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 after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
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 use-after-free vulnerability in Microsoft Edge (Chromium-based) allows an authenticated attacker to achieve code execution via network access. The flaw involves improper memory management where memory is accessed after being freed, potentially leading to arbitrary 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< 134.0.3124.66CVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
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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Locate Microsoft Edge installation pathOpen Command Prompt or PowerShell and run: where msedge (Windows) or check C:\Program Files (x86)\Microsoft\Edge\Application\ (typical install location on Windows)Affected if Edge is installed on the system
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Determine installed Edge versionIn Edge, navigate to edge://settings/help or run 'msedge --version' from command line. The version number displayed (e.g., 134.0.3124.x) is the installed version.Affected if Version displayed is less than 134.0.3124.66
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Compare version against vulnerability thresholdCompare your installed version number to the affected range: any version below 134.0.3124.66 is vulnerable. If your version is 134.0.3124.66 or higher, you are not in the affected range.Affected if Installed version is below 134.0.3124.66
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Verify browser is accessible to network attackersConfirm that Edge is used for browsing untrusted or external network content, or that the browser has network connectivity. The vulnerability is exploitable via network access when the browser processes malicious web content.Affected if Edge processes network content and version is vulnerable
You are affected if Microsoft Edge Chromium version is installed and is below 134.0.3124.66, and the browser is used to access network content.
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 · scoped134.0.3124.66
Apply Microsoft security updates for Microsoft Edge to obtain the patched version. Verify the browser version post-update and monitor for any unexpected behavior.
134.0.3124.66 or later
- Open Microsoft Edge browser
- Click on the Settings and more menu (three dots) in the top right corner
- Select 'Settings' from the dropdown menu
- In the left sidebar, click on 'Help and feedback'
- Click on 'About Microsoft Edge'
- The browser will check for updates and automatically download version 134.0.3124.66 or later
- Restart Microsoft Edge if prompted to complete the update
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-29815 — 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-2025-29815 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