CVE-2021-37544

Name: CVE-2021-37544
Creator: NVD / NIST
Published: 2021-08-06T14:15:08.11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-37544 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In JetBrains TeamCity before 2020.2.4, there was an insecure deserialization.. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

In JetBrains TeamCity before 2020.2.4, there was an insecure deserialization.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.20%

64.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Jetbrains	Teamcity	< 2020.2.4

References

https://blog.jetbrains.com/blog/2021/08/05/jetbrains-security-bulletin-q2-2021/Vendor Advisory
https://blog.jetbrains.com/blog/2021/08/05/jetbrains-security-bulletin-q2-2021/Vendor Advisory

Timeline

Published: Aug 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37544?

In JetBrains TeamCity before 2020.2.4, there was an insecure deserialization.

How severe is CVE-2021-37544?

CVE-2021-37544 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37544?

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-2021-37544?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST