Vendor / Project: Microsoft Product: Exchange Server Description: Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. Required Action: Apply updates per vendor instructions. Due Date: 2022-05-03 Ransomware Campaign Use: Known CWEs: CWE-918 Notes: Reference CISA's ED 21-02 (https://www.cisa.gov/news-events/directives/ed-21-02-mitigate-microsoft-exchange-premises-product-vulnerabilities) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 21-02. https://nvd.nist.gov/vuln/detail/CVE-2021-26855
CVE-2021-26855 — Microsoft Exchange Server Remote Code Execution Vulnerability
Kurzinfo
Metadaten
- Original (extern): Link oeffnen
- Veroeffentlicht: 2021-11-03 00:00 UTC
- Importiert: 2026-10-20 22:46 UTC
- CVSS: 9.1
- Quelle-ID:
cisa_kev - uid_hash:
0d074dcf7c0cce3e2ad1a5bfdc3449342bee3861ed189499ac73a5e5f2787d64
Inhalt
Verknuepfte CVEs
| CVE-ID | Severity (Quelle) | CVSS (Quelle) | Severity (CVE.org) | CVSS (CVE.org) | EPSS | EPSS-Pctl | Veroeffentlicht (CVE.org) |
|---|---|---|---|---|---|---|---|
CRITICAL |
9.1 |
CRITICAL |
9.1 |
2021-03-02 |
Quellen-Details
| Bezeichnung | Name | Kategorie | Tags | Zielgruppe | Sprache | Feed-URL |
|---|---|---|---|---|---|---|
| CISA – Known Exploited Vulnerabilities (KEV) | threat_intel | cisa, kev | - | de | https://raw.githubusercontent.com/cisagov/kev-data/develop/known_exploited_vulnerabilities.json |