CVE-2019-25634
Base64 Decoder 1.1.2 Local Buffer Overflow SEH Egghunter
- State
- Published
- Severity
- 8.6 High
- Published
- Mar 24, 2026
- Updated
- Jul 15, 2026
- Reserved
- Mar 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.4 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
Base64 Decoder4Mhz |
|
References
- ExploitDB-46625exploit
- Official Product Homepageproduct
- Product Referenceproduct
- VulnCheck Advisory: Base64 Decoder 1.1.2 Local Buffer Overflow SEH Egghunterthird-party-advisory
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