CVE coverage
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CVE-2021-26857
CVSS 7.8
Actively exploited (KEV)
2 detections found
Microsoft Exchange Server Remote Code Execution Vulnerability
Detection rules
| Source | Rule | Status | Updated |
|---|---|---|---|
| elastic | Microsoft Exchange Server UM Spawning Suspicious Processes | production | 2026-09-18 |
| sigma | Potential CVE-2021-26857 Exploitation Attempt | stable | 2023-02-07 |