VulnerabilityAnalyzed
CVE-2021-31196
Microsoft Exchange Server Information Disclosure Vulnerability
KEVHIGH 7.2EPSS 54.1%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 11 September 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 54.06% probability · 99th percentile
- CISA KEV
- Listed 21 August 2024 · due 11 September 2024
- Affected
- microsoft/exchange server
- Source
- secure@microsoft.com
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-31196; https://nvd.nist.gov/vuln/detail/CVE-2021-31196
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.