Threat Intelligence / CVE / CVE-2026-58643

CVE-2026-58643 — Microsoft Windows Admin Center

CVSS v3.1 6.1 (MEDIUM) · EPSS 0.2% (higher than 15.0% of all scored CVEs) · Priority 3.7/10 · Published 2026-07-16

As of 2026-07-16, CVE-2026-58643 is a MEDIUM-severity vulnerability in Microsoft Windows Admin Center, CVSS v3.1 6.1, EPSS 0.2% (15.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-58643, most recently “Microsoft July 2026 Patch Tuesday: 570 Vulnerabilities Fixed, Including 2 Actively Exploited Zero-Days (CVE-2026-56164, CVE-2026-56155)”.

Last updated: 2026-07-16

What is CVE-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.

The record classifies CVE-2026-58643 under weakness class CWE-79. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 58 days ago.

Severity and exploitation probability

CVSS v3.1 base score
6.1 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C
EPSS (FIRST)
0.2% probability of exploitation in the next 30 days, higher than 15.0% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
3.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-07-16

Is CVE-2026-58643 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-58643

No vendor patch reference has been recorded for CVE-2026-58643 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-58643

1 tracked threat in the Threadlinqs corpus references CVE-2026-58643, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch

Full detection coverage & IOCs for threats exploiting CVE-2026-58643 are available via the Threadlinqs MCP server (Purple tier). View plans →

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