Intel

CVE-2026-54995

microsoft windows_10_1607: Use-After-Free

highEPSS 0.8%

Affected

  • microsoft/windows_10_1607 lt *..10.0.14393.9339
  • microsoft/windows_10_1607 lt *..10.0.14393.9339
  • microsoft/windows_10_1809 lt *..10.0.17763.9020
  • microsoft/windows_10_1809 lt *..10.0.17763.9020
  • microsoft/windows_10_21h2 lt *..10.0.19044.7548
  • microsoft/windows_10_21h2 lt *..10.0.19044.7548
  • microsoft/windows_10_21h2 lt *..10.0.19044.7548
  • microsoft/windows_10_22h2 lt *..10.0.19045.7548
  • microsoft/windows_10_22h2 lt *..10.0.19045.7548
  • microsoft/windows_10_22h2 lt *..10.0.19045.7548
  • microsoft/windows_11_24h2 lt *..10.0.26100.8875
  • microsoft/windows_11_24h2 lt *..10.0.26100.8875
  • microsoft/windows_11_25h2 lt *..10.0.26200.8875
  • microsoft/windows_11_25h2 lt *..10.0.26200.8875
  • microsoft/windows_11_26h1 lt *..10.0.28000.2525
  • microsoft/windows_11_26h1 lt *..10.0.28000.2525
  • microsoft/windows_server_2016 lt *..10.0.14393.9339
  • microsoft/windows_server_2019 lt *..10.0.17763.9020
  • microsoft/windows_server_2022 lt *..10.0.20348.5386
  • microsoft/windows_server_2025 lt *..10.0.26100.33158

Description

Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.

Source: cvelistv5NVD (NIST)CVE.org (MITRE)Microsoft Security Update GuideBSI WID PortalBSI CSAF

Affected operating systems

  • windows

    microsoft / windows_10_1607

  • windows

    microsoft / windows_10_1809

  • windows

    microsoft / windows_10_21h2

  • windows

    microsoft / windows_10_22h2

  • windows

    microsoft / windows_11_24h2

  • windows

    microsoft / windows_11_25h2

  • windows

    microsoft / windows_11_26h1

  • windows

    microsoft / windows_server_2012r2

  • windows

    microsoft / windows_server_2012

  • windows

    microsoft / windows_server_2016

  • windows

    microsoft / windows_server_2019

  • windows

    microsoft / windows_server_2022

  • windows

    microsoft / windows_server_2025

Metrics

XIEM Effective CVSS
8.1
Source: nvd-v3
EPSS percentile
55.0 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
high
Priority score
86.89
Exploit maturity
no public PoC known
CVSS v3
8.1
EPSS score
0.8 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-07-14 17:17 UTC
CWE
CWE-416

Weakness classes (CWE)

  • CWE-416Variant

    Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. Initial Analysis2026-07-20 17:18 UTC· nvd@nist.gov
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    • CPE Configuration: OR *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.14393.9339 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.14393.9339 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.17763.9020 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.17763.9020 *cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.9339 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.9020 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.5386 *cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.33158 *cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.28000.2525 *cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.28000.2525 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.26100.8875 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.26100.8875 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.19044.7548 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.19044.7548 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.19044.7548 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.19045.7548 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.19045.7548 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.19045.7548 *cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.26200.8875 *cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.26200.8875
    • Reference Type: Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54995 Types: Patch, Vendor Advisory

Linked advisories