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CVE-2026-26172Patch(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

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-362CWE-416

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_10_21h2
  • windows_10_22h2
  • windows_11_23h2
  • windows_11_24h2

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-04-15); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
windows_10_21h2windows_10_22h2windows_11_23h2windows_11_24h2windows_11_25h2windows_11_26h1windows_server_2022windows_server_2022_23h2windows_server_2025

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-15: 2Mentions · 2026-04-25: 1Patch / Workaround · 2026-04-15: 1Patch / Workaround · 2026-04-25: 1Technical Details · 2026-04-15: 2Technical Details · 2026-04-25: 104-1504-25
Signal classification2 categories
Patch
266.7%
Disclosure
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-04-152
Disclosure1Patch1
2026-04-251
Patch1
Full discourse3 posts
  • Giuseppe Paternicola@giuseppe_1337
    Patch

    🚨 HIGH Severity: CVE-2026-26172 (CVSS 7.8) Race condition in Windows Push Notifications enables local privilege escalation. Authenticated attackers can exploit improper synchronization to gain elevated privileges. Patch immediately. #CVE #Vulnerability #PatchNow https://t.co/f3yGCcVN6B

    Post summary

    The tweet announces a high‑severity race‑condition flaw (CVE‑2026‑26172) in Windows Push Notifications that allows local privilege escalation and urges users to apply a patch immediately.

    0000071
    25 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-26172 Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate pri… https://www.cve.org/CVERecord?id=CVE-2026-26172

    Post summary

    The text announces CVE-2026-26172, describing a race condition that enables privilege escalation, without providing PoC, exploit code, or mitigation details.

    00000145
    57.2K followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 “Confidence” rating for CVE-2026-26172 basically means: how likely Microsoft thinks attackers already read the exploit. Urgency math is cool, but patch ASAP anyway. #WindowsSecurity https://windowsforum.com/threads/cve-2026-26172-windows-push-notifications-eop-how-microsoft-confidence-guides-urgency.413190/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #PushNotifications #PrivilegeEscalation #Cve202626172 https://t.co/55N3C17Ax2

    Post summary

    The post discusses Microsoft's confidence rating for CVE‑2026‑26172 and urges admins to patch, but offers no PoC, exploit, or detailed technical info.

    0000035
    1.1K followersView on X
CPE platform detail17 entries

17 of 17 entries

PartVendorProductVersionTarget SWTarget HW
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_2022---
OSmicrosoftwindows_server_2022_23h2---
OSmicrosoftwindows_server_2025---

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