CVE-2021-31196: Microsoft Exchange Server Information Disclosure Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Microsoft Exchange Server contains an information disclosure vulnerability that allows for remote code execution.

Required action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-31196; https://nvd.nist.gov/vuln/detail/CVE-2021-31196

Weakness behind it

CISA has not recorded a CWE for this entry, so the CVE → CWE → CAPEC → ATT&CK chain cannot be walked from here. That is a gap in the catalogue, not evidence the vulnerability has no weakness class — check the NVD record below.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-31196
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog