CVE-2026-62698: Microsoft Digest Authentication Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-62698

Numeric truncation error in Microsoft Digest Authentication allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: Digest Authentication Privilege escalation

What: Numeric truncation error in Microsoft Digest Authentication enables local privilege escalation.
Who is affected: Systems using Microsoft Digest Authentication where an authorized attacker has local access.
Urgency: High severity (CVSS 7.8) with no active exploitation; patch to prevent local privilege escalation.
Action: Apply the latest security patch addressing CVE-2026-62698.

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-2026-62698

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-2026-626980.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62698	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 Microsoft Digest Authentication

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-2026-62698: Numeric truncation error in Microsoft Digest Authentication allows an authorized attacker to e…nvd · 2026-08-11