CVE-2021-26309

LOWNVD 3.33.3—

3.3

Information disclosure in the TeamCity plugin for IntelliJ before 2020.2.2.85899 was possible because a local temporary file had Insecure Permissions.

CVSS v3: 3.3
EG Score: 3.3(medium)
EPSS: 0.0%
KEV: Not listed

Published

May 11, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://blog.jetbrains.com
cve@mitrehttps://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/
af854a3a-2127-422b-91ae-364da2661108https://blog.jetbrains.com
af854a3a-2127-422b-91ae-364da2661108https://blog.jetbrains.com/blog/2021/05/07/jetbrains-security-bulletin-q1-2021/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-668Exposure of Resource to Wrong Sphere

Data Freshness Timeline

(refreshed 0× in last 7d / 2× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-26 16:49 UTCEG score recompute
2026-05-26 16:49 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-26309?

CVE-2021-26309 is a low vulnerability published on May 11, 2021. Information disclosure in the TeamCity plugin for IntelliJ before 2020.2.2.85899 was possible because a local temporary file had Insecure Permissions.

When was CVE-2021-26309 disclosed?

CVE-2021-26309 was first published in the National Vulnerability Database on May 11, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-26309 actively exploited?

CVE-2021-26309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-26309?

CVE-2021-26309 has a CVSS v3 base score of 3.3 (NVD).

How do I remediate CVE-2021-26309?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-26309, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-26309

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-26309?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)