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CVE-2026-45596Patch(microsoft / windows_10_1607)

LOWCVSS 7.0 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_10_1607 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Use after free in Windows Ancillary Function Driver for WinSock 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_1607
  • windows_10_1809
  • windows_10_21h2
  • windows_10_22h2

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 (2026-06-09); latest day: 1
  • 2 total mentions across 2 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 timeline2 mentions / 2d
00111Mentions · 2026-06-09: 1Mentions · 2026-06-12: 1Patch / Workaround · 2026-06-09: 1Patch / Workaround · 2026-06-12: 1Technical Details · 2026-06-09: 1Technical Details · 2026-06-12: 106-0906-12
Signal classification1 categories
Patch
2100.0%
Referenced assets1 URL
Full discourse2 posts
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 HIGH severity CVE-2026-45596 (CVSS 7.0): Use-after-free in Windows Ancillary Function Driver for WinSock enables local privilege escalation. Authenticated attackers can gain elevated privileges. Patch immediately. #CVE #Vulnerability #PatchNow https://t.co/4KcZYMVDYz

    Post summary

    The tweet announces high‑severity CVE‑2026‑45596, a use‑after‑free flaw in Windows WinSock that enables local privilege escalation, and urges users to apply the pending patch immediately.

    0000042
    44 followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 Another “adjacent to networking” driver got popped: CVE-2026-45596 in afd.sys. Not wormable, but local EoP is still the attacker’s favorite hobby—your PC, your keys. https://windowsforum.com/threads/patch-cve-2026-45596-local-elevation-of-privilege-in-windows-afd-afd-sys.424528/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #LocalPrivilegeEscalation #Cve202645596 #AfdAfdSys https://t.co/IuzZCFwt92

    Post summary

    The post announces a patch for CVE‑2026‑45596, a local privilege‑escalation flaw in afd.sys, noting it is not wormable and does not appear to be actively exploited.

    0000032
    1.2K 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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