CVE-2021-30184
CVSS v3
7.8
HIGH
EPSS Score
1.8 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
GNU Chess 6.2.7 allows attackers to execute arbitrary code via crafted PGN (Portable Game Notation) data. This is related to a buffer overflow in the use of a .tmp.epd temporary file in the cmd_pgnload and cmd_pgnreplay functions in frontend/cmd.cc.
Technical details
- Published
- 2021-04-07
Frequently asked questions
What is CVE-2021-30184?
GNU Chess 6.2.7 allows attackers to execute arbitrary code via crafted PGN (Portable Game Notation) data. This is related to a buffer overflow in the use of a .tmp.epd temporary file in the cmd_pgnload and cmd_pgnreplay functions in frontend/cmd.cc.
Is CVE-2021-30184 actively exploited?
Active exploitation of CVE-2021-30184 has not been confirmed. Its EPSS score was 1.8% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-30184?
CVE-2021-30184 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2021-30184 affecting your environment?
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