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CVE-2026-78445Patch(microsoft / windows_server_2012)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_server_2012 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-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_server_2012
  • windows_server_2016
  • windows_server_2019
  • windows_server_2022

Threat summary

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

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 2 signals
  • Peaked 1d ago at 1 mentions (2026-09-11); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
windows_server_2012windows_server_2016windows_server_2019windows_server_2022windows_server_2025

2 versions affected across 5 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-09-11: 1Mentions · 2026-09-12: 1Patch / Workaround · 2026-09-11: 1Patch / Workaround · 2026-09-12: 1Technical Details · 2026-09-11: 1Technical Details · 2026-09-12: 109-1109-12
Signal classification1 categories
Patch
2100.0%
Referenced assets1 URL
By indicator
Full discourse2 posts
  • Rıdvan Yağlı@ridvanyagli
    Patch

    🔴 Windows Services for NFS ONCRPC XDR Driver bileşeninde, unauthenticated RCE sağlayabilen CVE-2026-78445 — CVSS 9.8 Critical seviyede bir UAF açığı. Microsoft, açığı Eylül 2026 Patch Tuesday kapsamında yamaladı. ⚠️ NFS kullanan Windows Server sistemlerinin güncel olduğu kontrol edilmeli. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78445

    Post summary

    The post announces that Microsoft has patched CVE‑2026‑78445, a critical unauthenticated RCE UAF vulnerability.

    00050613
    2.4K followersView on X
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 CRITICAL: CVE-2026-78445 (CVSS 9.8) Use-after-free in Windows Services for NFS ONCRPC XDR Driver enables unauthenticated RCE over network. No user interaction required. Patch immediately. #CVE #Vulnerability #PatchNow #ThreatIntel #DFIR https://t.co/L89LsUn6sU

    Post summary

    A critical use‑after‑free flaw (CVE‑2026‑78445) in the Windows NFS ONCRPC XDR Driver enables unauthenticated remote code execution; the advisory urges immediate patching.

    0000050
    133 followersView on X
CPE platform detail6 entries

6 of 6 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2012r2--
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2025---

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