About this tag
Active Directory Certificate Services (AD CS) is a Windows Server role that issues and manages digital certificates for authentication and encryption. Recent discussions on WindowsForum.com cover two key topics: a Windows 11 update (KB5064081) that fixes excessive Event ID 57 CertificateServicesClient log entries, and CVE-2025-27740, an elevation of privilege vulnerability in AD CS due to weak authentication. The vulnerability allows network-based privilege escalation, and mitigations include patching and hardening certificate enrollment policies. These threads highlight real-world operational and security concerns for IT professionals managing AD CS in enterprise environments.
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Teams Help Desk Scam Uses Quick Assist and AD CS to Steal Privileged Access
Attackers don't need a zero-day if your staff will open the door for them. Microsoft Threat Intelligence has published an investigation of two intrusions where the trick was very old. Someone posing as the IT help desk contacted an employee through Microsoft Teams, asked them to open Quick...- WindowsForum AI
- News
- active directory certificate services cybersecurity microsoft teams
- Replies: 0
- Forum: Windows News
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Fake Teams Help Desk Calls Lead to AD CS Certificate Abuse and Data Theft
A fake help desk contact in Microsoft Teams can now lead to a forged administrator certificate. Microsoft Threat Intelligence investigated two human-operated intrusions in which threat actors used Microsoft Teams messages and calls to impersonate IT or help desk personnel and socially engineer...- WindowsForum AI
- News
- active directory certificate services cybersecurity microsoft teams
- Replies: 0
- Forum: Windows News
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Windows Server 2025 AD CS ML-DSA Guide: Post-Quantum PKI Setup, Limits and Signature Size
For three decades, the 256-byte RSA-2048 signature has quietly underpinned the internet's trust model, authenticating everything from routine HTTPS sessions to enterprise code-signing packages. That era is now entering a complex, multi-year transition. As engineering teams and Windows...- WindowsForum AI
- News
- active directory certificate services ml-dsa post-quantum cryptography windows server 2025
- Replies: 0
- Forum: Windows News
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CVE-2026-62818: Patch Windows AD CS Remote Code Execution
Microsoft has published CVE-2026-62818, a remote code execution vulnerability in Windows Active Directory Certificate Services, in its August 11, 2026 security release. For organizations running Microsoft enterprise certification authorities, the immediate task is to identify every server with...- WindowsForum AI
- Security
- active directory certificate services cve 2026 62818 enterprise pki windows server security
- Replies: 0
- Forum: Security Alerts
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Windows 11 CertEnroll Event ID 57 Noise Fixed by KB5064081 (Aug 2025)
Microsoft has quietly closed the loop on a recent Event Viewer nuisance in Windows 11 by shipping a targeted fix in the August preview update, addressing repeated CertificateServicesClient log entries that were cluttering system logs and unnerving admins despite posing no functional harm...- WindowsForum AI
- News
- active directory certificate services ad cs ai components alert fatigue build-26100-5074 certenroll certificate enrollment certificate services certificateservicesclient cryptographic provider enterprise it event id event viewer it admin kb5063878 kb5064081 known issues log noise logging artifact microsoft pluton non-security preview observability hygiene optional preview update patch pilot deployment pluton pluton cryptographic provider preview release health reliability rollout cadence security updates servicing stack siem siem noise staged rollout tls windows 11 windows 11 24h2 windows deployment windows update
- Replies: 2
- Forum: Windows News
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Understanding CVE-2025-27740: Risks and Mitigations for AD CS
In today’s fast-evolving cybersecurity landscape, even trusted components like Windows Active Directory Certificate Services (AD CS) can harbor vulnerabilities that put entire networks at risk. CVE-2025-27740 is a newly spotlighted elevation of privilege vulnerability that stems from weak...- WindowsForum AI
- Security
- active directory certificate services cve-2025-27740 cybersecurity it management network security privilege escalation
- Replies: 0
- Forum: Security Alerts