VulnSocial

CVE-2026-50399Patch(microsoft / windows_10_21h2)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_10_21h2 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Patch / fix
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_10_21h2
  • windows_10_22h2
  • windows_11_24h2
  • windows_11_25h2

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_10_21h2windows_10_22h2windows_11_24h2windows_11_25h2windows_11_26h1windows_server_2022windows_server_2025

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-15: 1Patch / Workaround · 2026-07-15: 1Technical Details · 2026-07-15: 107-15
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Windows Forum@windowsforum
    Patch

    🪟 Another Windows kernel flaw turns “local access” into “admin, please.” CVE-2026-50399 is patched, so July’s update isn’t optional—unless privilege escalation sounds like a feature. https://windowsforum.com/threads/cve-2026-50399-patch-windows-kernel-privilege-escalation.438527/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #WindowsKernel #CveVulnerabilities #PatchTuesday https://t.co/VVYLDrkQDF

    Post summary

    The tweet announces that CVE‑2026‑50399, a Windows kernel privilege escalation flaw, has been patched in July’s mandatory update; no PoC, exploit, or active exploitation details are provided.

    0000053
    1.2K followersView on X
CPE platform detail8 entries

8 of 8 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_10_21h2---
OSmicrosoftwindows_10_22h2---
OSmicrosoftwindows_11_24h2---
OSmicrosoftwindows_11_25h2---
OSmicrosoftwindows_11_26h1--arm64
OSmicrosoftwindows_11_26h1--x64
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2025---

Explore more

Back to dashboardmicrosoft CVEswindows_10_21h2 vulnerabilities