How severe is CVE-2019-18364?

CVE-2019-18364 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-18364 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18364?

CVE-2019-18364 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18364?

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

When was CVE-2019-18364 published?

CVE-2019-18364 was published on 2019-10-31 and last updated on 2026-06-17.

CVE-2019-18364

CVE-2019-18364 is a critical-severity vulnerability in Jetbrains Teamcity with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Jetbrains Teamcity
Published: 2019-10-31
Last modified: 2026-06-17

Description

In JetBrains TeamCity before 2019.1.4, insecure Java Deserialization could potentially allow remote code execution.

Frequently asked questions

What is CVE-2019-18364?: In JetBrains TeamCity before 2019.1.4, insecure Java Deserialization could potentially allow remote code execution.
How severe is CVE-2019-18364?: CVE-2019-18364 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-18364 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18364?: CVE-2019-18364 affects Jetbrains Teamcity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18364?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-18364 published?: CVE-2019-18364 was published on 2019-10-31 and last updated on 2026-06-17.

References

https://blog.jetbrains.com/blog/2019/10/29/jetbrains-security-bulletin-q3-2019/

Affected products (1)

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

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