CVE-2020-37124
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductB64dec
PublishedFeb 5, 2026
First seenFeb 5, 2026
Weakness typeCWE-121CWE-121
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 4Mhz B64dec | 1.1.2 | — |
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