📌 LmCompatibilityLevel 5 GPO Setting Fails to Fully Block NTLMv1 in Active Directory https://www.cyberhub.blog/article/22896-lmcompatibilitylevel-5-gpo-setting-fails-to-fully-block-ntlmv1-in-active-directory
LmCompatibilityLevel 5 GPO Setting Fails to Fully Block NTLMv1 in Active Directory
Setting `LmCompatibilityLevel` to 5 does not fully block NTLMv1 in Active Directory environments. The policy fails to enforce restrictions on applications that explicitly request NTLMv1 via the `ParameterControl` flag in the Netlogon Remote Protocol (MS-NRPC). Microsoft confirmed this behavior but does not classify it as a vulnerability, instead planning to remove NTLMv1 in Windows Server 2025 and Windows 11 24H2. Audit logging is suggested to identify NTLMv1 usage in existing environments.
www.cyberhub.blog
November 2, 2026 at 2:37 PM
📌 LmCompatibilityLevel 5 GPO Setting Fails to Fully Block NTLMv1 in Active Directory https://www.cyberhub.blog/article/22896-lmcompatibilitylevel-5-gpo-setting-fails-to-fully-block-ntlmv1-in-active-directory
October 29, 2026 at 4:06 PM
Win11 24H2 Home/Pro updates end; Server 2022 enters extended support; GitHub Copilot agent hits Teams, old app retires Nov 16; ONLYOFFICE 10.0 has 35–43 security fixes; mount ISOs in File Explorer. Member mug art. +15 more stories
Windows 11 24H2 Support Ends: Upgrade Guide, NTLMv1 SSO Wi-Fi Fix and Server 2022 Lifecycle
October's Patch Tuesday brought three separate changes, and each one lands on a different team. Windows 11 version 24H2 Home and Pro stopped getting updates. Windows Server 2022 left mainstream…
windowsforum.com
November 3, 2026 at 6:00 AM
Win11 24H2 Home/Pro updates end; Server 2022 enters extended support; GitHub Copilot agent hits Teams, old app retires Nov 16; ONLYOFFICE 10.0 has 35–43 security fixes; mount ISOs in File Explorer. Member mug art. +15 more stories
Hacktober in één aflevering: PHP2Shell, Broccoli... eh Brotli2Shell, een GitLab-lek van 12 jaar oud en een UEFI-bug van 16. En Microsoft biedt 60.000 man een vertrekregeling. Is oktober nou eindelijk klaar?
S06A41 – Hacktober voorbij: alles lekt, behalve je NAS (die staat offline) - IT Bro's
Raymond en Sander sluiten Hacktober af met stapels lekken, een afslankend Microsoft en AI-agents. Nieuws Insider-builds: privacyrechten per app. Het message center meldt NTLMv1-hardening. Microsoft bi...
itbros.nl
October 30, 2026 at 12:38 PM
Hacktober in één aflevering: PHP2Shell, Broccoli... eh Brotli2Shell, een GitLab-lek van 12 jaar oud en een UEFI-bug van 16. En Microsoft biedt 60.000 man een vertrekregeling. Is oktober nou eindelijk klaar?
Windows 11's October 13 update can stop work Wi-Fi and VPN from signing you in automatically; one registry value decides it
https://lockergnome.com/windows-11-october-update-ntlmv1-work-wifi-vpn-sign-in-fix/
#windows11 #ntlm #wifi #tech
https://lockergnome.com/windows-11-october-update-ntlmv1-work-wifi-vpn-sign-in-fix/
#windows11 #ntlm #wifi #tech
October 30, 2026 at 2:40 AM
Windows 11's October 13 update can stop work Wi-Fi and VPN from signing you in automatically; one registry value decides it
https://lockergnome.com/windows-11-october-update-ntlmv1-work-wifi-vpn-sign-in-fix/
#windows11 #ntlm #wifi #tech
https://lockergnome.com/windows-11-october-update-ntlmv1-work-wifi-vpn-sign-in-fix/
#windows11 #ntlm #wifi #tech
NTLMv1 still on your radar? 🛡️ Microsoft’s Tech Community blog, “Bracing for BlockNtlmv1SSO,” is worth a look for IT pros preparing for authentication changes and thinking through what comes next. Kudos to the author for putting this important topic on the community’s radar! 👏
👉👉 tip.tbone.se/Q5lI79
👉👉 tip.tbone.se/Q5lI79
October 29, 2026 at 4:06 PM
NTLMv1 still on your radar? 🛡️ Microsoft’s Tech Community blog, “Bracing for BlockNtlmv1SSO,” is worth a look for IT pros preparing for authentication changes and thinking through what comes next. Kudos to the author for putting this important topic on the community’s radar! 👏
👉👉 tip.tbone.se/Q5lI79
👉👉 tip.tbone.se/Q5lI79
KB5127648 breaks WPA2-Enterprise 802.1X PEAP Wi-Fi BlockNtlmv1SSO fix
Windows 11 KB5127648 Breaks WPA2-Enterprise Wi-Fi: Full Fix
Installing Windows 11 update KB5127648 breaks WPA2-Enterprise (802.1X PEAP) Wi-Fi via NTLMv1 hardening.
www.virlan.co/ai/windows-1...
Windows 11 KB5127648 Breaks WPA2-Enterprise Wi-Fi: Full Fix
Installing Windows 11 update KB5127648 breaks WPA2-Enterprise (802.1X PEAP) Wi-Fi via NTLMv1 hardening.
www.virlan.co/ai/windows-1...
Windows 11 KB5127648 Breaks WPA2-Enterprise Wi-Fi: Full Fix
Installing Windows 11 update KB5127648 breaks WPA2-Enterprise (802.1X PEAP) Wi-Fi via NTLMv1 hardening. Use this PowerShell and registry guide to fix it.
www.virlan.co
October 26, 2026 at 3:29 PM
KB5127648 breaks WPA2-Enterprise 802.1X PEAP Wi-Fi BlockNtlmv1SSO fix
Windows 11 KB5127648 Breaks WPA2-Enterprise Wi-Fi: Full Fix
Installing Windows 11 update KB5127648 breaks WPA2-Enterprise (802.1X PEAP) Wi-Fi via NTLMv1 hardening.
www.virlan.co/ai/windows-1...
Windows 11 KB5127648 Breaks WPA2-Enterprise Wi-Fi: Full Fix
Installing Windows 11 update KB5127648 breaks WPA2-Enterprise (802.1X PEAP) Wi-Fi via NTLMv1 hardening.
www.virlan.co/ai/windows-1...
#Windows11 #Update #kb5127648 deaktiviert das #NTLMv1-Protokoll (#BlockNTLMv1SSO). Danach geht das Hinzufügen von #Druckern über "Gerät hinzufügen" nicht mehr. Es gibt aber einen Workaround.
borncity.com/blog/2026/10...
borncity.com/blog/2026/10...
Windows 11 Update KB5127648: „Gerät hinzufügen“ bei Druckern kaputt?
Das kumulative Update KB5127648 für Windows 11 24H2 – 26H2 vom 13. Oktober 2026 scheint einen weiteren Kollateralschaden hervorzurufen. An Servern freigegebene Drucker lassen sich nicht mehr über…
borncity.com
October 23, 2026 at 10:30 PM
#Windows11 #Update #kb5127648 deaktiviert das #NTLMv1-Protokoll (#BlockNTLMv1SSO). Danach geht das Hinzufügen von #Druckern über "Gerät hinzufügen" nicht mehr. Es gibt aber einen Workaround.
borncity.com/blog/2026/10...
borncity.com/blog/2026/10...
Le patch di ottobre 2026 per Windows 11 bloccano alcune autenticazioni NTLMv1, causando problemi a WiFi, Ethernet e VPN aziendali. Ecco come individuare gli errori, ripristinare temporaneamente le connessioni e risolvere.
Windows 11, perché le patch di ottobre bloccano WiFi, VPN e reti aziendali
Le patch di ottobre 2026 per Windows 11 bloccano alcune autenticazioni NTLMv1, causando problemi a WiFi, Ethernet e VPN aziendali. Ecco come individuare gli errori, ripristinare temporaneamente le connessioni e risolvere.
www.ilsoftware.it
October 19, 2026 at 10:01 AM
Le patch di ottobre 2026 per Windows 11 bloccano alcune autenticazioni NTLMv1, causando problemi a WiFi, Ethernet e VPN aziendali. Ecco come individuare gli errori, ripristinare temporaneamente le connessioni e risolvere.
KB5127648 just broke Wi-Fi and VPN logins on Windows 11 and Server 2025. The culprit: BlockNtlmv1SSO flipped from audit to enforce, killing old NTLMv1-based 802.1X and VPN setups. Shop Key Online breaks down the fix 👇
October 19, 2026 at 6:00 PM
KB5127648 just broke Wi-Fi and VPN logins on Windows 11 and Server 2025. The culprit: BlockNtlmv1SSO flipped from audit to enforce, killing old NTLMv1-based 802.1X and VPN setups. Shop Key Online breaks down the fix 👇
NTLMv1なくなって困るってことは
NTLMv1くらいしか喋られない古いネットワーク機器や認証サーバーってことですか？ 脆弱脆弱ぅ～
NTLMv1くらいしか喋られない古いネットワーク機器や認証サーバーってことですか？ 脆弱脆弱ぅ～
October 17, 2026 at 10:39 PM
NTLMv1なくなって困るってことは
NTLMv1くらいしか喋られない古いネットワーク機器や認証サーバーってことですか？ 脆弱脆弱ぅ～
NTLMv1くらいしか喋られない古いネットワーク機器や認証サーバーってことですか？ 脆弱脆弱ぅ～
Windows October update axes NTLMv1 by default
The October 2026 Windows security update now blocks NTLMv1-derived credentials by default, impacting networking for unmigrated systems.
Microsoft has been clear for years this was coming.
The October 2026 Windows security update now blocks NTLMv1-derived credentials by default, impacting networking for unmigrated systems.
Microsoft has been clear for years this was coming.
October 16, 2026 at 4:14 PM
Windows October update axes NTLMv1 by default
The October 2026 Windows security update now blocks NTLMv1-derived credentials by default, impacting networking for unmigrated systems.
Microsoft has been clear for years this was coming.
The October 2026 Windows security update now blocks NTLMv1-derived credentials by default, impacting networking for unmigrated systems.
Microsoft has been clear for years this was coming.
3/ October Patch Tuesday: now with less Wi-Fi. KB5127648 enforces NTLMv1 restrictions and some WPA-Enterprise Wi-Fi/VPN logins (MS-CHAPv2) stop working. Workaround: dial security back down. Classic. windowsreport.com/…
Microsoft Confirms KB5127648 and KB5126646 Break Wi-Fi and VPN, Shares a Fix
Microsoft has confirmed that the October 2026 Patch Tuesday updates can cause authentication failures on some Wi-Fi, Ethernet, and VPN connections.
windowsreport.com
October 18, 2026 at 10:22 PM
3/ October Patch Tuesday: now with less Wi-Fi. KB5127648 enforces NTLMv1 restrictions and some WPA-Enterprise Wi-Fi/VPN logins (MS-CHAPv2) stop working. Workaround: dial security back down. Classic. windowsreport.com/…
🖥️ Microsoft Blocks NTLMv1
In September 2026, Microsoft confirmed Windows will support NTLM. After the October update, NTLMv1 credentials are blocked by default. NTLM was introduced in 1993 with Windows NT 3.1.
https://www.theregister.com/security/2026/10/16/networking-problems-after-the-october-
In September 2026, Microsoft confirmed Windows will support NTLM. After the October update, NTLMv1 credentials are blocked by default. NTLM was introduced in 1993 with Windows NT 3.1.
https://www.theregister.com/security/2026/10/16/networking-problems-after-the-october-
October 17, 2026 at 5:20 PM
🖥️ Microsoft Blocks NTLMv1
In September 2026, Microsoft confirmed Windows will support NTLM. After the October update, NTLMv1 credentials are blocked by default. NTLM was introduced in 1993 with Windows NT 3.1.
https://www.theregister.com/security/2026/10/16/networking-problems-after-the-october-
In September 2026, Microsoft confirmed Windows will support NTLM. After the October update, NTLMv1 credentials are blocked by default. NTLM was introduced in 1993 with Windows NT 3.1.
https://www.theregister.com/security/2026/10/16/networking-problems-after-the-october-
NTLMv1というかMS-CHAPv2、2012年に脆弱性発見されて修正不可、移行しろって言われてましたやん～
October 17, 2026 at 10:47 PM
NTLMv1というかMS-CHAPv2、2012年に脆弱性発見されて修正不可、移行しろって言われてましたやん～
Lost Wi-Fi or VPN after Windows’ October update? NTLMv1 is the likely culprit
Microsoft's October security update blocks NTLMv1-derived single sign-on by default, and some work Wi-Fi, Ethernet and VPN logins are paying for it....
Microsoft's October security update blocks NTLMv1-derived single sign-on by default, and some work Wi-Fi, Ethernet and VPN logins are paying for it....
Lost Wi-Fi or VPN after Windows’ October update? NTLMv1 is the likely culprit
Microsoft's October security update blocks NTLMv1-derived single sign-on by default, and some work Wi-Fi, Ethernet and VPN logins are paying for it.
tbreak.com
October 17, 2026 at 10:42 AM
Lost Wi-Fi or VPN after Windows’ October update? NTLMv1 is the likely culprit
Microsoft's October security update blocks NTLMv1-derived single sign-on by default, and some work Wi-Fi, Ethernet and VPN logins are paying for it....
Microsoft's October security update blocks NTLMv1-derived single sign-on by default, and some work Wi-Fi, Ethernet and VPN logins are paying for it....
Networking problems after the October 2026 Windows update? NTLM might be to blame
The October 2026 Windows security update blocks NTLMv1-derived credentials for single sign-on by default, which could break Wi-Fi, Ethern... https://threatintel.cc/2026/10/18/networking-problems-after-the-october.html
The October 2026 Windows security update blocks NTLMv1-derived credentials for single sign-on by default, which could break Wi-Fi, Ethern... https://threatintel.cc/2026/10/18/networking-problems-after-the-october.html
October 18, 2026 at 9:14 AM
Networking problems after the October 2026 Windows update? NTLM might be to blame
The October 2026 Windows security update blocks NTLMv1-derived credentials for single sign-on by default, which could break Wi-Fi, Ethern... https://threatintel.cc/2026/10/18/networking-problems-after-the-october.html
The October 2026 Windows security update blocks NTLMv1-derived credentials for single sign-on by default, which could break Wi-Fi, Ethern... https://threatintel.cc/2026/10/18/networking-problems-after-the-october.html
Es ist zwar Herbst und nicht Frühjahr, aber auf dem Homeserver stand ein wenig Aufräumen und Aufputzen an. Zeit die Sicherheit ein wenig auf Vordermann zu bringen und die noch für alte Sonos-Geräte nötigen SMB1 Samba-Freigaben einzuschränken.
#Anleitung #ArchLinux #Homelab #Samba #Sicherheit #Sonos
#Anleitung #ArchLinux #Homelab #Samba #Sicherheit #Sonos
Samba für Sonos S1: SMB1 erlauben, ohne das ganze Heimnetz aufzureißen
Alte Sonos-Lautsprecher spielen eure Musiksammlung nur per SMB1 und NTLMv1 ab. Ein eigener Benutzer, eine schreibgeschützte Freigabe und ein paar Zeilen in der smb.conf sorgen dafür, dass die Lautsprecher spielen, ohne dass der Rest des Heimservers unnötig offen steht.
linuxundich.de
October 18, 2026 at 3:50 PM
Es ist zwar Herbst und nicht Frühjahr, aber auf dem Homeserver stand ein wenig Aufräumen und Aufputzen an. Zeit die Sicherheit ein wenig auf Vordermann zu bringen und die noch für alte Sonos-Geräte nötigen SMB1 Samba-Freigaben einzuschränken.
#Anleitung #ArchLinux #Homelab #Samba #Sicherheit #Sonos
#Anleitung #ArchLinux #Homelab #Samba #Sicherheit #Sonos
金曜日に職場の同僚のうち、二人のパソコンにWi-Fiの異常が起きていました。この現象だったのか～。
《2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響》
forest.watch.impress.co.jp/docs/news/21...
《2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響》
forest.watch.impress.co.jp/docs/news/21...
2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響／あらかじめ計画されていた変更、パッチの不具合ではない
2026年10月のセキュリティ更新プログラム「KB5127648」を適用した環境で一部のWi‑Fiや有線LAN、VPN接続で認証が失敗する問題が報告されているが、これは同パッチで導入された「NTLMv1」のセキュリティ強化によるもののようだ。この変更は以前から計画・告知されていたもので、パッチの不具合ではない。米Microsoftは10月14日（現地時間）、「Windows メッセージセンター」を...
forest.watch.impress.co.jp
October 17, 2026 at 5:21 PM
金曜日に職場の同僚のうち、二人のパソコンにWi-Fiの異常が起きていました。この現象だったのか～。
《2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響》
forest.watch.impress.co.jp/docs/news/21...
《2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響》
forest.watch.impress.co.jp/docs/news/21...
あっちの方でオススメに上がってきていたWPA2-Enterpriseが繋がらなくなった件、NTLMv1デフォルト無効化の話なんかずっと前に出てたでしょとしか…
October 18, 2026 at 3:57 AM
あっちの方でオススメに上がってきていたWPA2-Enterpriseが繋がらなくなった件、NTLMv1デフォルト無効化の話なんかずっと前に出てたでしょとしか…
토요일 윈도우 보안 업데이트로 기업들 내부 랜/와이파이 뻗은 곳이 많다는군요 . 구형 프로토콜을 막은거라서 기술 담당자들이 돌아다니면서 하나하나 레지스트리 수정해야 한다고..
한국 회사들도 월요일이 기대된다!
당연히 맥은 문제없음 ...
forest.watch.impress.co.jp/docs/news/21...
한국 회사들도 월요일이 기대된다!
당연히 맥은 문제없음 ...
forest.watch.impress.co.jp/docs/news/21...
2026年10月「Windows Update」でWi-Fi/VPNに接続できない問題、脱「NTLMv1」が影響／あらかじめ計画されていた変更、パッチの不具合ではない
2026年10月のセキュリティ更新プログラム「KB5127648」を適用した環境で一部のWi‑Fiや有線LAN、VPN接続で認証が失敗する問題が報告されているが、これは同パッチで導入された「NTLMv1」のセキュリティ強化によるもののようだ。この変更は以前から計画・告知されていたもので、パッチの不具合ではない。米Microsoftは10月14日（現地時間）、「Windows メッセージセンター」を...
forest.watch.impress.co.jp
October 18, 2026 at 1:25 AM
토요일 윈도우 보안 업데이트로 기업들 내부 랜/와이파이 뻗은 곳이 많다는군요 . 구형 프로토콜을 막은거라서 기술 담당자들이 돌아다니면서 하나하나 레지스트리 수정해야 한다고..
한국 회사들도 월요일이 기대된다!
당연히 맥은 문제없음 ...
forest.watch.impress.co.jp/docs/news/21...
한국 회사들도 월요일이 기대된다!
당연히 맥은 문제없음 ...
forest.watch.impress.co.jp/docs/news/21...
NTLMv1がWindows Updateで止めれて困る組織
脆弱性残します・どうぞ攻撃してください宣言してるようなもんだから
あんまり言わないほうがいいのでは......？？？
脆弱性残します・どうぞ攻撃してください宣言してるようなもんだから
あんまり言わないほうがいいのでは......？？？
October 17, 2026 at 10:38 PM
NTLMv1がWindows Updateで止めれて困る組織
脆弱性残します・どうぞ攻撃してください宣言してるようなもんだから
あんまり言わないほうがいいのでは......？？？
脆弱性残します・どうぞ攻撃してください宣言してるようなもんだから
あんまり言わないほうがいいのでは......？？？
IT'S V1!
> To be clear, this is not a bug and is by design. The addition of NTLM to the deprecation list occurred in 2024, and Microsoft added audit logs for NTLMv1 usage in late August 2025. The Windows giant has made no secret of its desire to ditch the legacy technology[...]
> To be clear, this is not a bug and is by design. The addition of NTLM to the deprecation list occurred in 2024, and Microsoft added audit logs for NTLMv1 usage in late August 2025. The Windows giant has made no secret of its desire to ditch the legacy technology[...]
October 16, 2026 at 3:57 PM
IT'S V1!
> To be clear, this is not a bug and is by design. The addition of NTLM to the deprecation list occurred in 2024, and Microsoft added audit logs for NTLMv1 usage in late August 2025. The Windows giant has made no secret of its desire to ditch the legacy technology[...]
> To be clear, this is not a bug and is by design. The addition of NTLM to the deprecation list occurred in 2024, and Microsoft added audit logs for NTLMv1 usage in late August 2025. The Windows giant has made no secret of its desire to ditch the legacy technology[...]