CVE-2021-33766
Microsoft Exchange Server Information Disclosure
CVSS
7.3
Alta
EPSS
98.2%
p100
KEV
SIM
18 de jan. de 2022
Exploit Today
80
0-100
Publicado: 14 de jul. de 2021 · Última mod.: 10 de ago. de 2026
98.2%EPSS · 30 dias98.2%
2026-10-082026-11-05
Produto
Microsoft / Exchange Server
Vulnerabilidade
Microsoft Exchange Server Information Disclosure
Adicionado ao KEV
18 de jan. de 2022
Corrigir até
1 de fev. de 2022
Uso conhecido em ransomware
Não
Descrição resumida
Microsoft Exchange Server contains an information disclosure vulnerability which can allow an unauthenticated attacker to steal email traffic from target.
Ação necessária
Apply updates per vendor instructions.
Notas
https://nvd.nist.gov/vuln/detail/CVE-2021-33766
Microsoft Exchange Server Information Disclosure Vulnerability
- msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33766
- portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33766
- www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-798/
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33766
CVECVSSEPSSKEVRExploitTítuloMod.
CVE-2023-215298.8 ALT99.1%
KEV—80Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability78dCVE-2022-410808.8 ALT99.6%
KEV—80Microsoft Exchange Server Privilege Escalation Vulnerability87dCVE-2021-345239.0 CRÍ100.0%
KEV—80Microsoft Exchange Server Privilege Escalation Vulnerability87dCVE-2021-344739.1 CRÍ100.0%
KEV—80Microsoft Exchange Server Remote Code Execution Vulnerability87dCVE-2021-311967.2 ALT99.0%
KEV—80Microsoft Exchange Server Information Disclosure Vulnerability87dCVE-2021-270657.8 ALT100.0%
KEV—80Microsoft Exchange Server Remote Code Execution Vulnerability35d