CVE-2025-59295
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 · uneditedHeap-based buffer overflow in Internet Explorer allows an unauthorized 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 confidenceHeap-based buffer overflow in Internet Explorer allows an unauthorized attacker to execute arbitrary code over a network. This is a memory corruption vulnerability where improper bounds checking on heap allocations enables an attacker to overwrite adjacent memory and achieve 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< 10.0.10240.21161< 10.0.14393.8519< 10.0.17763.7919< 10.0.19044.6456< 10.0.19045.6456< 10.0.22621.6060<= 10.0.22631.6060< 10.0.26100.6899CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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 Internet Explorer is present on the systemCheck for the presence of iexplore.exe in typical locations such as C:\Program Files\Internet Explorer\iexplore.exe or C:\Program Files (x86)\Internet Explorer\iexplore.exe, or list the installed Windows Features to confirm the Internet Explorer feature is enabled.Affected if Internet Explorer executable or feature is found on the system.
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Confirm Internet Explorer is not disabled or removedOpen Windows Features (appwiz.cpl -> Turn Windows features on or off) and verify whether Internet Explorer is checked/enabled, or check the registry key at HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects for active IE components.Affected if Internet Explorer feature is enabled or iexplore.exe can be launched.
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Identify the installed Windows versionRun winver.exe or execute 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' from command prompt to retrieve the exact Windows build number.Affected if The Windows build number is below any of the following thresholds depending on your Windows release: 10.0.10240.21161 (Win10 1507), 10.0.14393.8519 (Win10 1607), 10.0.17763.7919 (Win10 1809), 10.0.19044.6456 (Win10 21h2), 10.0.19045.6456 (Win10 22h2), 10.0.22621.6060 (Win11 22h2), 10.0.22631.6060 (W
A system is affected by this vulnerability only if Internet Explorer is present and enabled, and the Windows version falls within any of the affected build ranges listed.
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 · scoped10.0.10240.2116110.0.14393.851910.0.17763.7919
Given IE's deprecated status, prioritize disabling or removing Internet Explorer entirely and migrating to Microsoft Edge or alternative modern browsers. If IE cannot be removed, apply any available Microsoft security updates and restrict network access to trusted zones.
Windows 10 1507: build 10.0.10240.21161 or later | Windows 10 1607: build 10.0.14393.8519 or later | Windows 10 1809: build 10.0.17763.7919 or later | Windows 10 21h2: build 10.0.19044.6456 or later | Windows 10 22h2: build 10.0.19045.6456 or later | Windows 11 22h2: build 10.0.22621.6060 or later |
- Check current Windows version by running 'winver' or 'systeminfo' in Command Prompt
- Identify which Windows 10 or 11 version and build number is installed
- Apply the appropriate Windows Security Update (KB) for this CVE from Microsoft Update Catalog or Windows Update
- Restart the system after applying the update
- Verify the update was installed successfully by checking Windows Update history
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-59295 — 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-2025-59295 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