Cyber Risks · Cisco Talos

Six critical vulnerabilities included in August’s Microsoft security update

Summary: Microsoft disclosed 73 vulnerabilities across its products in its August security update, six of them rated critical, and said one moderate-severity flaw, CVE-2023-38180, a denial-of-service issue in .NET and Visual Studio, has been actively exploited in the wild. Two critical remote code execution flaws, CVE-2023-29328 and CVE-2023-29330, sit in Microsoft Teams and are triggered by tricking a victim into joining an adversary-created meeting, while three more critical RCE flaws affect the Windows message queuing service and one affects Word.

What's compelling: The only flaw Microsoft confirms as exploited in the wild is rated moderate, not critical, and requires no user privileges or interaction, so severity labels alone will not tell you what is actually being used against you. The Teams flaws need only a meeting invite to land remote code execution in the victim's context, which puts the risk inside a collaboration tool most organizations treat as routine.

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Topics
Zero-Days & Exploits
Mentions
CVE-2023-29328CVE-2023-29330CVE-2023-35359CVE-2023-35368CVE-2023-35380CVE-2023-35382CVE-2023-35385CVE-2023-35386CVE-2023-35388CVE-2023-36895CVE-2023-36900CVE-2023-36910CVE-2023-36911CVE-2023-38180CVE-2023-38182CVE-2023-38185
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