CVE-2026-42897: Microsoft confirms active exploitation of Exchange Server zero
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2023-21529 | Authenticated Deserialization RCE in Microsoft Exchange Server (CVE-2023-21529) | 8.8 | 59% | KEVRansomware | KEV |
| CVE-2026-42897 | Cross-Site Scripting in Microsoft Exchange Server Actively Exploited by Laundry Bear | 6.1 | 71% | KEV | KEV |
From the original article
2 min read at securityaffairs.com
Microsoft warned that attackers are exploiting a new Exchange Server zero-day vulnerability, tracked as CVE-2026-42897, in the wild. Microsoft warned that threat actors are actively exploiting a new Exchange Server zero-day vulnerability tracked as CVE-2026-42897 (CVSS score 8. 1).
By @securityaffairs · securityaffairs.com
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