Product Webpageproduct
http://4mhz.de/b64dec.html CVE-2020-37124
HIGH
B64dec 1.1.2 - Buffer Overflow (SEH Overflow + Egg Hunter)
Record summary
CVE-2020-37124 has a selected CVSS score of 8.4 (high); EIP currently links 1 catalogued exploit.
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.
Description source: CVE List
Exploitation context
Available material
- Catalogued exploits
- 1
CISA SSVC decision
ExploitationPoC
AutomatableYes
Technical impactTotal
CISA Coordinator · SSVC 2.0.3 · Evaluated Feb 6, 2026 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
B64decBrowse 4Mhz / B64dec | CVE List | 1.1.2 | affected |
Proofs of concept
1Catalogued exploits
ExploitDBB64dec 1.1.2 - Buffer Overflow (SEH Overflow + EggHunter)ExploitDB exploitby Andy BowdenNot analyzed1 file
References
4nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2020-37124 ExploitDB-48317exploit
https://www.exploit-db.com/exploits/48317 VulnCheck Advisory: B64dec 1.1.2 - Buffer Overflow (SEH Overflow + Egg Hunter)Third-party advisory
https://www.vulncheck.com/advisories/bdec-buffer-overflow-seh-overflow-egg-hunter