CVE-2026-83910: RPC Runtime Library Remote Code Execution Vulnerability
Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.
Other sources
RPC Runtime Library Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems should be prioritized for assessment?
Assess Microsoft Windows 10, Windows 11, and the listed Windows Server releases: Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025. The issue is rated critical and can allow code execution over a network.
Does exploitation require authentication or user interaction?
No. The provided severity vector indicates network attack access, low attack complexity, no privileges required, and no user interaction.
What security impact could successful exploitation have?
Successful exploitation can enable remote code execution through an out-of-bounds write in the RPC Runtime. The supplied vector indicates high impact to confidentiality, integrity, and availability.
Is exploitation known to be publicly available?
The exploitation maturity field is marked E:U, indicating exploitation is unknown in the provided data. The remediation level is marked RL:O.