CVE-2021-31198
HIGHCVSS 7.8/10EPSS 4.87%
Last modified
CVE-2021-31198 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Microsoft Exchange Server Remote Code Execution Vulnerability. EPSS estimates a 4.87% chance of exploitation in the next 30 days.
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Exchange Server | 2013 | Cumulative Update 23 |
| Microsoft | Exchange Server | 2016 | Cumulative Update 19 |
| Microsoft | Exchange Server | 2019 | Cumulative Update 8 |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31198Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-894/Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31198Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-894/Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31198?
Microsoft Exchange Server Remote Code Execution Vulnerability
How severe is CVE-2021-31198?
CVE-2021-31198 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 4.87% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31198?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-31198?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST