CVE-2026-58643: Windows Admin Center Spoofing Vulnerability

unknownCVE-2026-58643

Improper neutralization of input during web page generation ('cross-site scripting') in Windows Admin Center allows an unauthorized attacker to perform spoofing over a network.

CSIRTS triage

vendor: Microsoft product: Windows Admin Center Cross-site scripting

What: Improper neutralization of input allows an unauthorized attacker to perform spoofing over a network.
Who is affected: Users of Windows Admin Center are affected.
Urgency: Remediation urgency is unclear due to lack of specific exploitation details.
Action: Apply the latest updates for Windows Admin Center.

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

⚡ Watch Windows Admin Center

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58643

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-2026-586430.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58643	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 Admin Center

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.

medium[NEW] [medium] Microsoft Windows Admin Center: Vulnerability allows Cross-Site Scriptingcert-bund · 2026-07-17
mediumCVE-2026-58643: Improper neutralization of input during web page generation ('cross-site scripting') in Window…nvd · 2026-07-16
unknownCVE-2026-14371: The Lenovo XClarity Integrator for Windows Admin Center plugin version 5.1.1 and below running…nvd · 2026-07-16
highCVE-2026-56197: Improper neutralization of special elements used in a command ('command injection') in Windows…nvd · 2026-07-14
highCVE-2026-56196: Relative path traversal in Windows Admin Center allows an authorized attacker to execute code …nvd · 2026-07-14
highCVE-2026-58631: Improper authorization in Windows Admin Center allows an authorized attacker to execute code l…nvd · 2026-07-14