CVE-2026-62768: Windows Installer Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-62768

Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: Windows Installer Privilege escalation Memory corruption

What: Stack-based buffer overflow in Windows Installer allows privilege escalation by an authenticated local user.
Who is affected: Authenticated users with local system access.
Urgency: High severity; Windows Installer runs with elevated privileges making this a critical attack vector.
Action: Install the latest Windows security update addressing CVE-2026-62768.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62768

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-2026-627680.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62768	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Installer Elevation

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-70347: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privi…nvd · 2026-08-11
highCVE-2026-70346: Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate priv…nvd · 2026-08-11
highCVE-2026-70345: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privi…nvd · 2026-08-11
highCVE-2026-70344: Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate priv…nvd · 2026-08-11
highCVE-2026-65774: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privi…nvd · 2026-08-11
highCVE-2026-62768: Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate priv…nvd · 2026-08-11