How severe is CVE-2020-37121?

CVE-2020-37121 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-37121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2020-37121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2020-37121 have an EU (EUVD) identifier?

Yes. CVE-2020-37121 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-31020.

When was CVE-2020-37121 published?

CVE-2020-37121 was published on 2026-02-05 and last updated on 2026-06-17.

CVE-2020-37121

CVE-2020-37121 is a medium-severity vulnerability with a CVSS 3.x base score of 5.5. 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-121.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.7
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-31020
Weakness: CWE-121
Published: 2026-02-05
Last modified: 2026-06-17

Description

CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious M3U playlist file with 536 bytes of buffer and shellcode to trigger remote code execution.

Frequently asked questions

What is CVE-2020-37121?: CODE::BLOCKS 16.01 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler with crafted Unicode characters. Attackers can create a malicious M3U playlist file with 536 bytes of buffer and shellcode to trigger remote code execution.
How severe is CVE-2020-37121?: CVE-2020-37121 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-37121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2020-37121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2020-37121 have an EU (EUVD) identifier?: Yes. CVE-2020-37121 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-31020.
When was CVE-2020-37121 published?: CVE-2020-37121 was published on 2026-02-05 and last updated on 2026-06-17.

References

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