CVE-2026-45592
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 · uneditedInteger overflow or wraparound in Windows Internet (wininet.dll) allows an authorized attacker to elevate privileges 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 confidenceInteger overflow or wraparound vulnerability in Windows Internet (wininet.dll) allows a locally authorized attacker to elevate privileges. The vulnerability stems from improper integer handling in the DLL that could be exploited to achieve higher privilege levels.
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< 10.0.14393.9234< 10.0.17763.8880< 10.0.19044.7417< 10.0.19045.7417< 10.0.22631.7219< 10.0.26100.8655< 10.0.26200.8655< 10.0.28000.2269CVSS 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
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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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Locate wininet.dll on the systemOpen File Explorer and navigate to C:\Windows\System32\wininet.dll (or use command: dir C:\Windows\System32\wininet.dll)Affected if The file exists and is the target for version checking
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Retrieve wininet.dll version informationRight-click wininet.dll, select Properties, then go to the Details tab to view File Version; alternatively, run 'powershell (Get-Item C:\Windows\System32\wininet.dll).VersionInfo' in an elevated command promptAffected if You obtain a version number such as 10.0.xxxx.xxxx format
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Compare installed version against affected Windows 10 1607 rangeIf running Windows 10 1607, check if the version is less than 10.0.14393.9234Affected if OS is Windows 10 1607 and wininet.dll version is below 10.0.14393.9234
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Compare installed version against affected Windows 10 1809 rangeIf running Windows 10 version 1809, check if the version is less than 10.0.17763.8880Affected if OS is Windows 10 1809 and wininet.dll version is below 10.0.17763.8880
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Compare installed version against affected Windows 10 21h2 and 22h2 rangesIf running Windows 10 21h2, check if version < 10.0.19044.7417; for 22h2, check if version < 10.0.19045.7417Affected if OS is Windows 10 21h2/22h2 and wininet.dll version is below the respective threshold
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Compare installed version against affected Windows 11 rangesCheck Windows 11 version (winver.exe) and compare: 23h2 < 10.0.22631.7219, 24h2 < 10.0.26100.8655, 25h2 < 10.0.26200.8655, 26h1 < 10.0.28000.2269Affected if OS is Windows 11 (any of the listed versions) and wininet.dll version is below the respective threshold
Your system is affected if wininet.dll version is lower than the threshold specified for your installed Windows version and build.
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 · scoped10.0.14393.923410.0.17763.888010.0.19044.7417
Apply Microsoft security updates for wininet.dll through standard Windows Update deployment or manual KB patch installation, followed by verification of successful installation.
Install the appropriate Cumulative Update for your Windows version with build number >= the fixed version listed for your specific release (e.g., Win10 22h2: >= 10.0.19045.7417)
- Identify the current Windows version and build number by running 'winver' or 'systeminfo'
- Determine which affected version range your system falls into from the listed versions
- Apply Windows Updates by going to Settings > Windows Update and clicking 'Check for updates'
- Alternatively, manually download and install the appropriate Cumulative Update for your Windows version from the Microsoft Update Catalog
- Restart the system after the update is installed
- Verify the installation was successful by checking the build number matches or exceeds: Win10 1607: 10.0.14393.9234, Win10 1809: 10.0.17763.8880, Win10 21h2: 10.0.19044.7417, Win10 22h2: 10.0.19045.7417, Win11 23h2: 10.0.22631.7219, Win11 24h2: 10.0.26100.8655, Win11 25h2: 10.0.26200.8655, Win11 26h1: 10.0.28000.2269
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-45592 — 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-2026-45592 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
- No spam, self-promotion, credentials, or personal data