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CVE-2026-33100Patch(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-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 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-04-14); 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 14 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-04-14: 1Mentions · 2026-04-15: 1Patch / Workaround · 2026-04-14: 1Technical Details · 2026-04-14: 1Technical Details · 2026-04-15: 104-1404-15
Signal classification2 categories
Patch
150.0%
Disclosure
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-04-141
Patch1
2026-04-151
Disclosure1
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-33100 Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. https://www.cve.org/CVERecord?id=CVE-2026-33100

    Post summary

    The text announces a new CVE (CVE‑2026‑33100) detailing a use‑after‑free flaw in a Windows driver that permits local privilege escalation, without providing a PoC, exploit code, or mention of active exploitation or patches.

    0000076
    57.2K followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 CVE-2026-33100 in AFD.sys is the kind of bug that quietly hands a local attacker admin power. No splashy “new feature” — just patch and move on. https://windowsforum.com/threads/cve-2026-33100-afd-sys-windows-local-privilege-escalation-patch-now.413110/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #PrivilegeEscalation #AfdSys #Cve202633100 https://t.co/Lrf56niqJN

    Post summary

    The post highlights that CVE‑2026‑33100 is a local privilege‑escalation flaw in AFD.sys and urges users to apply the available patch.

    0000036
    1.1K followersView on X
CPE platform detail25 entries

25 of 25 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_2022_23h2---
OSmicrosoftwindows_server_2025---

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