CVE-2020-37124 - B64dec 1.1.2 - Buffer Overflow (SEH Overflow + Egg Hunter)

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HIGH

B64dec 1.1.2 - Buffer Overflow (SEH Overflow + Egg Hunter)

Published Feb 5, 2026

8.4

HIGH

CVSS 4.0

EPSS 0.41%

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.

Affected products

Vendor 4Mhz Product B64dec Default
n/a
- Version
  1.1.2
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

4Mhz

B64dec

n/a

Version	Status	Constraints
1.1.2	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-121

References (3)

http://4mhz.de/b64dec.html
product
https://www.exploit-db.com/exploits/48317
exploit
https://www.vulncheck.com/advisories/bdec-buffer-overflow-seh-overflow-egg-hunter
third-party-advisory

Link	Providers	Tags
http://4mhz.de/b64dec.html		product
https://www.exploit-db.com/exploits/48317		exploit
https://www.vulncheck.com/advisories/bdec-buffer-overflow-seh-overflow-egg-hunter		third-party-advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner VulnCheck

Published Feb 5, 2026

Updated Feb 6, 2026

Reserved Feb 3, 2026

Link CVE-2020-37124

CISA Vulnrichment

Updated Feb 6, 2026

NVD

Status Deferred

Modified Jun 17, 2026

Link CVE-2020-37124

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-37124