CVE-2026-62908: Windows Backup Engine Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-62908

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: Windows Backup Engine Privilege escalation

What: Race condition in Windows Backup Engine permits local privilege escalation by authorized users.
Who is affected: Systems running Windows Backup Engine with local user accounts.
Urgency: High severity (CVSS 7.0); not exploited but privilege escalation risk requires urgent patching.
Action: Apply the Windows security update containing the fix for Windows Backup Engine.

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
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62908

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-2026-629080.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62908	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

critical[NEW] [critical] Microsoft Windows Products: Multiple vulnerabilitiescert-bund
unknownexploitedNCSC-2026-0284 [1.00] [M/H] Vulnerabilities patched in Microsoft Windowsncsc-nl
highCVE-2026-62908: Concurrent execution using shared resource with improper synchronization ('race condition') in…nvd

Recent advisories for Windows Backup Engine

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-2026-62908: Concurrent execution using shared resource with improper synchronization ('race condition') in…nvd · 2026-08-11
highCVE-2026-58598: Concurrent execution using shared resource with improper synchronization ('race condition') in…nvd · 2026-07-16
highCVE-2026-50406: Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges lo…nvd · 2026-07-14
highCVE-2026-50406: Windows Backup Engine Elevation of Privilege Vulnerabilitymsrc · 2026-07-14