CVE-2026-83910 — Microsoft
CRITICALCVE-2026-83910 is a critical-severity (CVSS 9.8) Out-of-bounds Write vulnerability. No vendor fix is recorded yet; mitigation options are listed below.
Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.
Description
Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-83910 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.
Frequently Asked Questions
Is CVE-2026-83910 in your dependencies?
Find it across , including transitive dependencies.