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CVE-2026-69875

HIGH 8 ALL-YEARS

Published 2026-09-08 · Last modified 2026-10-14 · microsoft · NVD: Analyzed

Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges over a network.

ELEVATED IMPACT

Severe if exploited (CVSS 8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.8%chance of exploitation in 30 days · 55th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

8CVSS 3.1 · HIGH · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Microsoft

Products Windows 10 Version 1809 Windows 10 Version 21h2 Windows 10 Version 22h2 Windows 11 Version 23h2 Windows 11 Version 24h2 Windows 11 Version 25h2 Windows 11 Version 26h1 Windows Server 2019 Windows Server 2019 (Server Core Installation) Windows Server 2022 Windows Server 2025 Windows Server 2025 (Server Core Installation) Windows 10 1809 Windows 10 21h2 Windows 10 22h2 Windows 11 23h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1

Weakness (CWE)

  • CWE-122: : Heap-based Buffer Overflow
  • CWE-125: : Out-of-bounds Read

CVSS vector

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

References and research data (JSON)

Known Affected Software Configurations

VendorProductVersion range
MicrosoftWindows 10 1809< 10.0.17763.9245
MicrosoftWindows 10 1809< 10.0.17763.9245
MicrosoftWindows 10 21h2< 10.0.19044.7725
MicrosoftWindows 10 21h2< 10.0.19044.7725
MicrosoftWindows 10 21h2< 10.0.19044.7725
MicrosoftWindows 10 22h2< 10.0.19045.7725
MicrosoftWindows 10 22h2< 10.0.19045.7725
MicrosoftWindows 10 22h2< 10.0.19045.7725
MicrosoftWindows 11 23h2< 10.0.22631.7582
MicrosoftWindows 11 23h2< 10.0.22631.7582
MicrosoftWindows 11 24h2< 10.0.26100.9445
MicrosoftWindows 11 24h2< 10.0.26100.9445
MicrosoftWindows 11 25h2< 10.0.26200.9445
MicrosoftWindows 11 25h2< 10.0.26200.9445
MicrosoftWindows 11 26h1< 10.0.28000.2954
MicrosoftWindows 11 26h1< 10.0.28000.2954
MicrosoftWindows Server 2019< 10.0.17763.9245
MicrosoftWindows Server 2022< 10.0.20348.5622
MicrosoftWindows Server 2025< 10.0.26100.33438

All CVSS metrics

  • HIGH 8 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
  • HIGH 8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

Patches & mitigations

Advisories

Sources: NVD · CVE.org · All sources and attribution · EPSS