CVE-2026-50420Patch(microsoft / windows_11_24h2)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft windows_11_24h2 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to disclose information locally.

microsoft CVEs Back to dashboard

1.0/ 10 priority

Sources & remediation

Patch / fix

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50420

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_24h2
windows_11_25h2
windows_11_26h1
windows_server_2025

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_24h2windows_11_25h2windows_11_26h1windows_server_2025

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://windowsforum.com/threads/cve-2026-50420-http-sys-memory-leak-fixed-in-july-windows-updates.438535/?utm_source=x&utm_medium=social&utm_campaign=news_node84

Full discourse1 post

Windows Forum@windowsforum98d
Patch
🪟 Windows HTTP.sys was leaking memory through an out-of-bounds read. July’s fix closes the hole—another reminder that “Important” vulnerabilities still deserve “patch now” energy. https://windowsforum.com/threads/cve-2026-50420-http-sys-memory-leak-fixed-in-july-windows-updates.438535/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #HttpSys #PatchTuesday #Cve202650420 https://t.co/w5gvAU3TBQ
Post summary
The tweet clarifies that CVE‑2026‑50420 caused a memory leak in Windows HTTP.sys via an out‑of‑bounds read and notes that a July patch has remedied the issue, urging users to update.
0000015
1.2K followersView on X

CPE platform detail7 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

7 of 7 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	microsoft	windows_11_24h2	-	-	arm64
OS	microsoft	windows_11_24h2	-	-	x64
OS	microsoft	windows_11_25h2	-	-	arm64
OS	microsoft	windows_11_25h2	-	-	x64
OS	microsoft	windows_11_26h1	-	-	arm64
OS	microsoft	windows_11_26h1	-	-	x64
OS	microsoft	windows_server_2025	-	-	-

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