VulnSocial

CVE-2026-23666Disclosure(microsoft / .net_framework)

LOWCVSS 7.5 · HIGH

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.

microsoft CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-755CWE-366

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

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

  • .net_framework
  • windows_10_1607
  • windows_10_1809
  • windows_10_21h2

Threat summary

  • 4 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 4 signals
  • Disclosure: 3 classified signals
  • General: 1 classified signal
  • Peaked at 3 mentions on most recent observed day (2026-04-15)
  • 4 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
.net_frameworkwindows_10_1607windows_10_1809windows_10_21h2windows_10_22h2windows_11_22h2windows_11_23h2windows_11_24h2windows_11_25h2windows_11_26h1

9 versions affected across 14 products

Deep dive

Activity timeline4 mentions / 2d
01223Mentions · 2026-04-14: 1Mentions · 2026-04-15: 3Technical Details · 2026-04-14: 1Technical Details · 2026-04-15: 304-1404-15
Signal classification2 categories
Disclosure
375.0%
General
125.0%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-04-141
Disclosure1
2026-04-153
Disclosure2General1
Full discourse4 posts
  • 0day Signal@0dayPublishing
    Disclosure

    ⚠️ CVE-2026-23666: .NET Framework Denial of Servic... Race condition in .NET's shared resource handling opens trivial network-based DoS attacks against millions of enterpris... https://zerodaysignal.com/vulnerability/CVE-2026-23666 #netsec #vulnerability #CVE #sysadmin #zeroday

    Post summary

    The post announces a new race condition in the .NET Framework that can cause trivial network-based DoS attacks, with technical details accessible via the Zerodaysignal link.

    0000062
    218 followersView on X
  • Infoflowcloud@infoflowcloud
    General

    🚨*CVE* CVE-2026-23666 Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a n… https://www.cve.org/CVERecord?id=CVE-2026-23666 ----- Traducción: CVE-2026-23666 Eje… http://infoflow.cloud`

    Post summary

    The text references CVE-2026-23666—a race condition causing DoS in .NET Framework—without providing PoC, exploit, active exploitation, or patch details.

    0000035
    71 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-23666 Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a n… https://www.cve.org/CVERecord?id=CVE-2026-23666

    Post summary

    The post references CVE‑2026‑23666, outlining a race‑condition‑induced denial‑of‑service flaw in .NET Framework, but provides no details on exploits, patches, or active attacks.

    00000197
    57.2K followersView on X
  • VulnersHub@VulnersHub
    Disclosure

    CVE-2026-23666 .NET Framework Denial of Service Vulnerability http://dlvr.it/TS2LXr

    Post summary

    A concise tweet announcing the presence of CVE-2026-23666, a .NET Framework denial‑of‑service vulnerability, and directing readers to a link for more information.

    0000023
    6 followersView on X
CPE platform detail33 entries

33 of 33 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft.net_framework3.5--
Appmicrosoft.net_framework4.6.2--
Appmicrosoft.net_framework4.7--
Appmicrosoft.net_framework4.7.1--
Appmicrosoft.net_framework4.7.2--
Appmicrosoft.net_framework4.8--
Appmicrosoft.net_framework4.8.1--
OSmicrosoftwindows_10_1607--x64
OSmicrosoftwindows_10_1607--x86
OSmicrosoftwindows_10_1809--arm64
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_22h2--arm64
OSmicrosoftwindows_11_22h2--x64
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_2022---
OSmicrosoftwindows_server_2022_23h2--x64
OSmicrosoftwindows_server_2025--x64

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