Skip to main content

Boteraser | Website and Server Security Solutions

🛡️ CVE-2026-50360 — windows-10-21h2

🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-303 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-50360 is classified as CWE-303: Incorrect Implementation of Authentication Algorithm. The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

Affected software

CVE-2026-50360 is recorded against 7 packages.

  • windows-10-21h2 (fixed in 10.0.19044.7548)
  • windows-10-22h2 (fixed in 10.0.19045.7548)
  • windows-11-24h2 (fixed in 10.0.26100.8875)
  • windows-11-25h2 (fixed in 10.0.26200.8875)
  • windows-11-26h1 (fixed in 10.0.28000.2525)
  • windows-server-2022 (fixed in 10.0.20348.5386)
  • windows-server-2025 (fixed in 10.0.26100.33158)

Timeline and source

Published on 14 July 2026 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

msrc.microsoft.com

Same weakness in other software

These advisories are the same class of weakness (CWE-303: Incorrect Implementation of Authentication Algorithm) in other software:

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-303
Public Exploit ✅ No
Source NVD
Published 2026-07-14
Updated 2026-08-20
Modified 2026-07-23

Affected Packages

Software From version Fixed in
windows-10-21h2 — 10.0.19044.7548
windows-10-22h2 — 10.0.19045.7548
windows-11-24h2 — 10.0.26100.8875
windows-11-25h2 — 10.0.26200.8875
windows-11-26h1 — 10.0.28000.2525
windows-server-2022 — 10.0.20348.5386
windows-server-2025 — 10.0.26100.33158

Similar Threats

Site Security Check

Is windows-10-21h2 part of your stack?

CVE-2026-50360 is rated CVSS 8.8 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2026
✓