CVE-2026-54115
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 Active Directory allows an authorized attacker to elevate privileges locally.
In the news
Third-party coverage- Microsoft July 2026 Patch Tuesday fixes massive 570 flaws, 3 zero-days
- Microsoft CVE Summary - Bleeping Computer
Surfaced from public web coverage — external links open in a new tab.
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 confidenceAn integer overflow or wraparound vulnerability in Windows Active Directory allows an authenticated attacker to exploit improper integer handling in memory operations to achieve local privilege elevation, potentially gaining administrative or SYSTEM-level access on affected domain controllers or workstations.
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< 10.0.14393.9339< 10.0.17763.9020< 10.0.19044.7548< 10.0.19045.7548< 10.0.26100.8875< 10.0.26200.8875< 10.0.28000.2525all versions= r2CVSS 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.
-
Determine installed Windows versionRun 'winver' from command prompt or check System Properties, or run 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"'Affected if The displayed version falls within any of the affected ranges: Windows 10 1607 (<10.0.14393.9339), 1809 (<10.0.17763.9020), 21h2 (<10.0.19044.7548), 22h2 (<10.0.19045.7548); Windows 11 24h2 (<10.0.26100.8875), 25h2 (<10.0.26200.8875), 26h1 (<10.0.28000.2525); or Windows Server 2012 / 2012 R2 any ver
-
Verify Active Directory role or membershipCheck if the machine is a domain controller (run 'Get-ADComputer -Identity $env:COMPUTERNAME -Properties OperatingSystem' in PowerShell with AD module, or check System Properties for domain membership)Affected if The system is joined to an Active Directory domain or functions as a domain controller, as the vulnerability exists in Windows Active Directory components
-
Check current user authentication contextRun 'whoami /groups' to list current user group memberships, noting any domain user or administrative groupsAffected if The current user has authenticated domain credentials, as this is an authenticated attacker vulnerability requiring valid AD credentials to exploit
A system is affected if it runs any of the listed Windows versions, participates in an Active Directory environment, and an attacker with valid domain credentials could exploit the integer overflow for local privilege elevation.
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 data10.0.14393.933910.0.17763.902010.0.19044.7548
Apply Microsoft security updates for Windows Active Directory immediately when available; in the interim, limit local administrative privileges, enforce least-privilege access controls, and monitor for suspicious local privilege escalation activity.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $9,504.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-54115 — 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-2026-54115 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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