CVE-2026-62784: Microsoft Local Security Authority Server (lsasrv) Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to execute code over a network.
CSIRTS triage
- What
- Heap-based buffer overflow in lsasrv enables remote code execution.
- Who is affected
- Authorized remote attackers against systems running lsasrv.
- Urgency
- Critical severity (CVSS 8.8); RCE in core authentication service is high priority.
- Action
- Apply the latest Windows security update addressing CVE-2026-62784 immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62784
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-627840.92% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 57% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-62784 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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