HIGH CISA KEV
CVE-2021-33766
CVSS v3
7.3
HIGH
EPSS Score
93.5 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
Microsoft Exchange Server Information Disclosure Vulnerability
CISA Known Exploited Vulnerability
- Date Added
- 2022-01-18
- Patch Due Date
- 2022-02-01
- Ransomware Use
- Unknown
Technical details
- Published
- 2021-07-14
Frequently asked questions
What is CVE-2021-33766?
Microsoft Exchange Server Information Disclosure Vulnerability
Is CVE-2021-33766 actively exploited?
Yes. CVE-2021-33766 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-02-01.
What is the CVSS score for CVE-2021-33766?
CVE-2021-33766 has a CVSS v3 base score of 7.3 (HIGH severity).
Is CVE-2021-33766 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
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