CVE-2026-62882: Microsoft Outlook Spoofing Vulnerability

mediumCVSS 4.3CVE-2026-62882

Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

CSIRTS triage

vendor: Microsoft product: Outlook Authentication bypass

What: Insufficiently protected credentials in Microsoft Office Outlook allow network-based spoofing attacks.
Who is affected: Users of Microsoft Office Outlook configured for network credential usage.
Urgency: Medium; network exploitation possible but limited to spoofing/impersonation without code execution.
Action: Apply Microsoft's security patch for CVE-2026-62882 in Office Outlook.

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

⚡ Watch Outlook

Get an email when a new Outlook advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62882

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-2026-628820.60% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62882	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownMultiple vulnerabilities in Microsoft Office (August 12, 2026)cert-fr-avis
unknownNCSC-2026-0286 [1.00] [M/H] Vulnerabilities patched in Microsoft Officencsc-nl
mediumCVE-2026-62882: Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attack…nvd

Recent advisories for Microsoft Outlook Spoofing

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.

mediumCVE-2026-62882: Insufficiently protected credentials in Microsoft Office Outlook allows an unauthorized attack…nvd · 2026-08-11