CVE-2026-58529Patch(microsoft / windows_11_26h1)

LOWCVSS 7.1 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft windows_11_26h1 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529

Weakness type (CWE)

CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

windows_11_26h1

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
1 total mentions across 1 day

Affected systems

Vendors

microsoft

Products

windows_11_26h1

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://windowsforum.com/threads/kb5101649-fixes-cve-2026-58529-on-windows-11-26h1.438876/?utm_source=x&utm_medium=social&utm_campaign=news_node84

Full discourse1 post

Windows Forum@windowsforum97d
Patch
🪟 KB5101649 patches a high-severity AD FS info leak in Windows 11 26H1. If your build is pre-28000.2525, your directory secrets may be doing unpaid overtime. Patch now. https://windowsforum.com/threads/kb5101649-fixes-cve-2026-58529-on-windows-11-26h1.438876/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #Windows11 #CveVulnerabilities #Kb5101649 #AdFsSecurity https://t.co/44WudJwPlj
Post summary
The post announces that Microsoft KB5101649 patches a high‑severity AD FS information disclosure (CVE‑2026‑58529) on Windows 11 26H1 and urges users of older builds to apply the update.
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1.2K followersView on X

CPE platform detail2 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

2 of 2 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	microsoft	windows_11_26h1	-	-	arm64
OS	microsoft	windows_11_26h1	-	-	x64

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