CVE-2026-12200
Ritlabs TinyWeb Server Header libeay32.dll.html stack-based overflow
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jun 15, 2026
- Updated
- Jun 15, 2026
- Reserved
- Jun 14, 2026
Description
A security vulnerability has been detected in Ritlabs TinyWeb Server up to 1.94 on Win32. This impacts an unknown function in the library libeay32.dll.html of the component Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
TinyWeb ServerRitlabs |
|
References
- VDB-370842 | Ritlabs TinyWeb Server Header libeay32.dll.html stack-based overflowvdb-entrytechnical-description
- VDB-370842 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-12200 | CVE Analysis and Reportthird-party-advisory
- Submit #829894 | RITLabs TinyWeb 1.94 Stack-based Buffer Overflowthird-party-advisory
- https://nathan2.com/posts/tinyweb/exploit
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