How severe is CVE-2021-37545?

CVE-2021-37545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-37545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37545?

CVE-2021-37545 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37545?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-37545 published?

CVE-2021-37545 was published on 2021-08-06 and last updated on 2026-06-17.

CVE-2021-37545

CVE-2021-37545 is a high-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Jetbrains Teamcity
Published: 2021-08-06
Last modified: 2026-06-17

Description

In JetBrains TeamCity before 2021.1.1, insufficient authentication checks for agent requests were made.

Frequently asked questions

What is CVE-2021-37545?: In JetBrains TeamCity before 2021.1.1, insufficient authentication checks for agent requests were made.
How severe is CVE-2021-37545?: CVE-2021-37545 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-37545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37545?: CVE-2021-37545 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-37545 published?: CVE-2021-37545 was published on 2021-08-06 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:jetbrains:teamcity:*:*:*:*:*:*:*:*

More vulnerabilities in Jetbrains Teamcity

CVE-2026-63077 — Critical (CVSS 9.8): In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent…
CVE-2024-27198 — Critical (CVSS 9.8): In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible
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CVE-2023-42793 — Critical (CVSS 9.8): In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
CVE-2022-25263 — Critical (CVSS 9.8): JetBrains TeamCity before 2021.2.3 was vulnerable to OS command injection in the Agent Push feature configuration.
CVE-2022-24340 — Critical (CVSS 9.8): In JetBrains TeamCity before 2021.2.1, XXE during the parsing of the configuration file was possible.

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Other CWE-287 (Improper Authentication) vulnerabilities

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Browse all CWE-287 (Improper Authentication) vulnerabilities →