Microsoft patches actively exploited Exchange, Excel zero-days (CVE-2021-42321, CVE-2021-42292)
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
CVE-2021-26443+1 related CVE | Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability | 9.0 group max | 2% | ||
| CVE-2021-42292 | Security Feature Bypass in Microsoft Excel Enables Arbitrary Code Execution | 7.8 | 43% | KEV | KEV |
| CVE-2021-42298 | Microsoft Defender Remote Code Execution Vulnerability | 7.8 | 6% | ||
| CVE-2021-42321 | Authenticated RCE via Insecure Deserialization in Microsoft Exchange Server | 8.8 | 92% | KEVRansomwarePoC ×2 | KEV |
From the original article
2 min read at helpnetsecurity.com
It’s a light November 2021 Patch Tuesday from Microsoft: 55 fixed CVEs, of which two are zero-days under active exploitation: CVE-2021-42321, a Microsoft Exchange RCE, and CVE-2021-42292, a Microsoft Excel security feature bypass bug. CVE-2021-42321 , the remote code execution vulnerability in Microsoft Exchange Server 2016 and 2019, is due to issues with the validation of command-let (cmdlet) arguments.
By @zeljkazorz · helpnetsecurity.com
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