CVE-2020-37124

CRITICAL

9.8

Description

B64dec 1.1.2 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by overwriting Structured Exception Handler (SEH) with crafted input. Attackers can leverage an egg hunter technique and carefully constructed payload to inject and execute malicious code during base64 decoding process.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/5/2026

Last Modified2/5/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-121

References

http://4mhz.de/b64dec.html(disclosure@vulncheck.com)

https://www.exploit-db.com/exploits/48317(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/bdec-buffer-overflow-seh-overflow-egg-hunter(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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