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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00324.

Exploitation none

Automatable yes

Technical Impact partial

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

Vendor Product Default status Versions
Ritlabs TinyWeb Server affected
Version Status Constraints
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No data.

No data.

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Vendors Products
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Tinyweb Server Subscribe

Project Subscriptions

Vendors Products
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Tinyweb Server Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://nathan2.com/posts/tinyweb/ cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-12200 cve-icon cve-icon
https://vuldb.com/submit/829894 cve-icon cve-icon
https://vuldb.com/vuln/370842 cve-icon cve-icon
https://vuldb.com/vuln/370842/cti cve-icon cve-icon
History

Mon, 15 Jun 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 15 Jun 2026 00:45:00 +0000

Type Values Removed Values Added
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.
Title Ritlabs TinyWeb Server Header libeay32.dll.html stack-based overflow
First Time appeared Ritlabs
Ritlabs tinyweb Server
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:a:ritlabs:tinyweb_server:*:*:*:*:*:*:*:*
Vendors & Products Ritlabs
Ritlabs tinyweb Server
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.3, 'vector': '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'}

cvssV3_1

{'score': 7.3, 'vector': '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'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-06-15T21:50:10.901Z

Reserved: 2026-06-14T11:39:38.478Z

Link: CVE-2026-12200

cve-icon Vulnrichment

Updated: 2026-06-15T21:50:06.067Z

cve-icon NVD

Status : Deferred

Published: 2026-06-15T01:16:24.667

Modified: 2026-06-15T20:42:32.707

Link: CVE-2026-12200

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-15T05:30:30Z

Weaknesses