Description

Base64 Decoder 1.1.2 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overwrite. Attackers can craft a malicious input file that overflows a buffer, overwrites the SEH chain with a POP-POP-RET gadget address, and uses an egghunter payload to locate and execute shellcode for code execution.

INFO

Published Date :

2026-03-24T11:27:07.919Z

Last Modified :

2026-03-24T13:48:49.934Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2019-25634 vulnerability.

Vendors Products
4mhz
  • Base64 Decoder
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2019-25634.

URL Resource
http://4mhz.de/b64dec.html cve-icon cve-icon
http://4mhz.de/download.php?file=b64dec-1-1-2.zip cve-icon cve-icon
https://www.exploit-db.com/exploits/46625 cve-icon cve-icon
https://www.vulncheck.com/advisories/base64-decoder-local-buffer-overflow-seh-egghunter cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact