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Windows 10 1607Operating system · Microsoft

CVE-2026-54126

MEDIUM · 6.5 CVSS v3.1 Developing Published 2026-07-14
Fix available
A fix is available. Upgrade to 10.0.14393.9339 / 10.0.17763.9020 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges 5 weeks old

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 · unedited
Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

In the news

Third-party coverage
Trending covered by 1 outlet this week · latest 1mo ago

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 · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-08-11.

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
Windows 10 1607Operating system
Affected:< 10.0.14393.9339
Windows 10 1809Operating system
Affected:< 10.0.17763.9020
Windows 10 21h2Operating system
Affected:< 10.0.19044.7548
Windows 10 22h2Operating system
Affected:< 10.0.19045.7548
Windows 11 24h2Operating system
Affected:< 10.0.26100.8875
Windows 11 25h2Operating system
Affected:< 10.0.26200.8875
Windows 11 26h1Operating system
Affected:< 10.0.28000.2269< 10.0.28000.2525
Windows Server 2012Operating system
Affected:all versions

CVSS 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
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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 · scoped
Upgrade available Upgrade to 10.0.14393.9339 / 10.0.17763.9020 / 10.0.19044.7548 or later
Fixed in 10.0.14393.933910.0.17763.902010.0.19044.7548
Recommended fix High confidence

Upgrade to the minimum fixed build for your Windows version: Windows 10 1607 to 10.0.14393.9339, Windows 10 1809 to 10.0.17763.9020, Windows 10 21h2 to 10.0.19044.7548, Windows 10 22h2 to 10.0.19045.7548, Windows 11 24h2 to 10.0.26100.8875, Windows 11 25h2 to 10.0.26200.8875, Windows 11 26h1 to 10.0

  1. Identify the current Windows version and build number by running 'winver' or 'systeminfo' in Command Prompt
  2. Compare the current build against the minimum fixed versions for your Windows release
  3. For Windows 10 1607: Upgrade to build 10.0.14393.9339 or later
  4. For Windows 10 1809: Upgrade to build 10.0.17763.9020 or later
  5. For Windows 10 21h2: Upgrade to build 10.0.19044.7548 or later
  6. For Windows 10 22h2: Upgrade to build 10.0.19045.7548 or later
  7. For Windows 11 24h2: Upgrade to build 10.0.26100.8875 or later
  8. For Windows 11 25h2: Upgrade to build 10.0.26200.8875 or later
Caveat Standard Windows update risks apply; ensure backups and compatibility testing for line-of-business applications before deployment; Windows Server 2012 reaching end of support should be addressed with a migration plan

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $2,850. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-54126 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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