PT-2026-6568 · 4Mhz · B64Dec

Andy Bowden · Published 2026-02-05 · Updated 2026-02-05 · CVE-2020-37124

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions B64dec version 1.1.2

Description A buffer overflow allows attackers to execute arbitrary code by overwriting the Structured Exception Handler (SEH), which is a mechanism for handling software exceptions, using crafted input. This can be achieved by employing an egg hunter technique—a small piece of code used to find a larger payload in memory—and a carefully constructed payload during the base64 decoding process.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2020-37124

Affected Products

B64Dec

References · 4

• 🔥 https://exploit-db.com/exploits/48317 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-37124 · Security Note
• http://4mhz.de/b64dec.html · Note
• https://vulncheck.com/advisories/bdec-buffer-overflow-seh-overflow-egg-hunter · Note