VulnSocial

CVE-2026-42989PoC(microsoft / windows_10_1607)

MEDIUMCVSS 7.8 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Prioritize remediation for microsoft windows_10_1607 systems immediately
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft
  • Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

microsoft CVEsBack to dashboard
4.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-59

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

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

  • windows_10_1607
  • windows_10_1809
  • windows_10_21h2
  • windows_10_22h2

Threat summary

  • Public PoC and exploit tooling are both present
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Exploit tool or code specified in 2 signals
  • PoC mentioned or linked in 2 signals
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-06-10); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
microsoft
Products
windows_10_1607windows_10_1809windows_10_21h2windows_10_22h2windows_11_23h2windows_11_24h2windows_11_25h2windows_11_26h1windows_server_2012windows_server_2016

2 versions affected across 13 products

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-06-10: 1Mentions · 2026-06-12: 1Mentions · 2026-07-12: 1PoC Mentioned / Linked · 2026-06-12: 1PoC Mentioned / Linked · 2026-07-12: 1Exploit Tool / Code · 2026-06-12: 1Exploit Tool / Code · 2026-07-12: 1Technical Details · 2026-06-10: 106-1006-1207-12
Signal classification2 categories
PoC
266.7%
Disclosure
133.3%
Referenced assets1 URL
By indicator
Classification over time
DateTotalLabels
2026-06-101
Disclosure1
2026-06-121
PoC1
2026-07-121
PoC1
Full discourse3 posts
  • Cyber Advising@cyber_advising
    PoC

    CVE-2026-42989: Winlogon Elevation of Privilege Vulnerability PoC https://github.com/omair2084/misc/blob/master/poc_cve_2026_42989.ps1 https://t.co/nJO9r46612

    Post summary

    The post provides a PoC script for CVE‑2026‑42989, a Winlogon elevation of privilege flaw, but offers no exploitation details, patches, or evidence of active use.

    041020112120.4K
    13.6K followersView on X
  • Omair 🇵🇸@w3bd3vil
    PoC

    Delete HKLM 😅 using CVE-2026-42989 PoC: https://github.com/omair2084/misc/blob/master/poc_cve_2026_42989.ps1

    Post summary

    The tweet shares a PowerShell PoC script for CVE-2026-42989, enabling deletion of HKLM, but contains no evidence of active exploitation, patches, or detailed vulnerability information.

    00063858
    7.2K followersView on X
  • kawn@kawn2020
    Disclosure

    #windowsupdate #microsoft つづき ・CVE-2026-42985　8.8　リモート デスクトップ クライアント ・CVE-2026-42986　7.8　Microsoft Graphics コンポーネント ・CVE-2026-42989　7.8　Winlogon ・CVE-2026-44803　7.8　Windows Win32K: GRFX ・CVE-2026-44812　7.8　Windows Win32K: GRFX つづく…

    Post summary

    The post merely enumerates several recent CVEs with their severity scores and affected modules, without indicating exploitation or mitigation.

    1001087
    85 followersView on X
CPE platform detail24 entries

24 of 24 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_10_1607--x64
OSmicrosoftwindows_10_1607--x86
OSmicrosoftwindows_10_1809--x64
OSmicrosoftwindows_10_1809--x86
OSmicrosoftwindows_10_21h2--arm64
OSmicrosoftwindows_10_21h2--x64
OSmicrosoftwindows_10_21h2--x86
OSmicrosoftwindows_10_22h2--arm64
OSmicrosoftwindows_10_22h2--x64
OSmicrosoftwindows_10_22h2--x86
OSmicrosoftwindows_11_23h2--arm64
OSmicrosoftwindows_11_23h2--x64
OSmicrosoftwindows_11_24h2--arm64
OSmicrosoftwindows_11_24h2--x64
OSmicrosoftwindows_11_25h2--arm64
OSmicrosoftwindows_11_25h2--x64
OSmicrosoftwindows_11_26h1--arm64
OSmicrosoftwindows_11_26h1--x64
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2012r2--
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2025--x64

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