VulnSocial

CVE-2026-21517Disclosure(microsoft / windows_app)

LOWCVSS 7.0 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_app systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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

microsoft CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

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

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

  • windows_app

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 1 mentions (2026-02-10); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
microsoft
Products
windows_app

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-02-10: 1Mentions · 2026-02-11: 1Mentions · 2026-03-02: 1Patch / Workaround · 2026-02-11: 1Technical Details · 2026-02-10: 1Technical Details · 2026-02-11: 102-1002-1103-02
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-101
Disclosure1
2026-02-111
Patch1
2026-03-021
Disclosure1
Full discourse3 posts
  • John Woodman@JohnWoodman15
    Patch

    A patch was released and CVE assigned for the macOS priv esc I found in the Windows App (CVE-2026-21517)! Hoping to write a blog post on it soon once public disclosure is approved and I verify the vuln was fixed. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21517

    Post summary

    A patch has been released for CVE‑2026‑21517, a privilege‑escalation issue in the Windows App on macOS, with the author planning a blog post after verification; no exploitation or PoC is mentioned.

    1301861.8K
    485 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-21517 Improper link resolution before file access ('link following') in Windows App for Mac allows an authorized attacker to elevate privileges locally. https://www.cve.org/CVERecord?id=CVE-2026-21517

    Post summary

    The post discloses CVE-2026-21517, a local privilege escalation issue in the Windows App for Mac caused by improper link resolution before file access.

    00010441
    56.5K followersView on X
  • Aakash Rahsi@rahsi_aaka
    Disclosure

    CVE-2026-21517 | Windows App for Mac Installer Elevation of Privilege Vulnerability https://www.aakashrahsi.online/post/cve-2026-21517 https://t.co/2jeZBDqx9H

    Post summary

    The tweet announces CVE-2026-21517, an elevation of privilege vulnerability in the Windows App for Mac installer, and links to a blog post for further details.

    0000037
    2 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoftwindows_app-macos-

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