🛡️ CVE-2026-54982 — windows-10-1607
Description
Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
How this vulnerability can be exploited
This issue can be reached from an adjacent network, attack complexity is low, an attacker needs no 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.
Weakness class
CVE-2026-54982 is classified as CWE-191: Integer Underflow. A subtraction drops below the minimum for the type and wraps, yielding an unexpectedly large value.
Affected software
CVE-2026-54982 is recorded against 12 packages.
- windows-10-1607 (fixed in 10.0.14393.9339)
- windows-10-1809 (fixed in 10.0.17763.9020)
- 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-2012
- windows-server-2016 (fixed in 10.0.14393.9339)
- windows-server-2019 (fixed in 10.0.17763.9020)
- 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 20 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.
References
Details
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| windows-10-1607 | — | 10.0.14393.9339 |
| windows-10-1809 | — | 10.0.17763.9020 |
| 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-2012 | — | — |
| windows-server-2016 | — | 10.0.14393.9339 |
| windows-server-2019 | — | 10.0.17763.9020 |
| windows-server-2022 | — | 10.0.20348.5386 |
| windows-server-2025 | — | 10.0.26100.33158 |
References
Similar Threats
- High CVE-2022-35743
- Critical CVE-2022-35744
- High CVE-2022-35745
- High CVE-2022-35746
- Medium CVE-2022-35747
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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