CVE-2026-12200 (GCVE-0-2026-12200)
Vulnerability from cvelistv5 – Published: 2026-06-15 00:15 – Updated: 2026-06-15 00:15
VLAI
Title
Ritlabs TinyWeb Server Header libeay32.dll.html stack-based overflow
Summary
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.
Severity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/370842 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/370842/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-12200 | third-party-advisory |
| https://vuldb.com/submit/829894 | third-party-advisory |
| https://nathan2.com/posts/tinyweb/ | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Ritlabs | TinyWeb Server |
Affected:
1.0
Affected: 1.1 Affected: 1.2 Affected: 1.3 Affected: 1.4 Affected: 1.5 Affected: 1.6 Affected: 1.7 Affected: 1.8 Affected: 1.9 Affected: 1.10 Affected: 1.11 Affected: 1.12 Affected: 1.13 Affected: 1.14 Affected: 1.15 Affected: 1.16 Affected: 1.17 Affected: 1.18 Affected: 1.19 Affected: 1.20 Affected: 1.21 Affected: 1.22 Affected: 1.23 Affected: 1.24 Affected: 1.25 Affected: 1.26 Affected: 1.27 Affected: 1.28 Affected: 1.29 Affected: 1.30 Affected: 1.31 Affected: 1.32 Affected: 1.33 Affected: 1.34 Affected: 1.35 Affected: 1.36 Affected: 1.37 Affected: 1.38 Affected: 1.39 Affected: 1.40 Affected: 1.41 Affected: 1.42 Affected: 1.43 Affected: 1.44 Affected: 1.45 Affected: 1.46 Affected: 1.47 Affected: 1.48 Affected: 1.49 Affected: 1.50 Affected: 1.51 Affected: 1.52 Affected: 1.53 Affected: 1.54 Affected: 1.55 Affected: 1.56 Affected: 1.57 Affected: 1.58 Affected: 1.59 Affected: 1.60 Affected: 1.61 Affected: 1.62 Affected: 1.63 Affected: 1.64 Affected: 1.65 Affected: 1.66 Affected: 1.67 Affected: 1.68 Affected: 1.69 Affected: 1.70 Affected: 1.71 Affected: 1.72 Affected: 1.73 Affected: 1.74 Affected: 1.75 Affected: 1.76 Affected: 1.77 Affected: 1.78 Affected: 1.79 Affected: 1.80 Affected: 1.81 Affected: 1.82 Affected: 1.83 Affected: 1.84 Affected: 1.85 Affected: 1.86 Affected: 1.87 Affected: 1.88 Affected: 1.89 Affected: 1.90 Affected: 1.91 Affected: 1.92 Affected: 1.93 Affected: 1.94 cpe:2.3:a:ritlabs:tinyweb_server:*:*:*:*:*:*:*:* |
Credits
{
"containers": {
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:ritlabs:tinyweb_server:*:*:*:*:*:*:*:*"
],
"modules": [
"Header Handler"
],
"product": "TinyWeb Server",
"vendor": "Ritlabs",
"versions": [
{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"version": "1.10"
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{
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"version": "1.11"
},
{
"status": "affected",
"version": "1.12"
},
{
"status": "affected",
"version": "1.13"
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{
"status": "affected",
"version": "1.14"
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{
"status": "affected",
"version": "1.15"
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{
"status": "affected",
"version": "1.16"
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{
"status": "affected",
"version": "1.17"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"version": "1.36"
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{
"status": "affected",
"version": "1.37"
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{
"status": "affected",
"version": "1.38"
},
{
"status": "affected",
"version": "1.39"
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{
"status": "affected",
"version": "1.40"
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{
"status": "affected",
"version": "1.41"
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{
"status": "affected",
"version": "1.42"
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{
"status": "affected",
"version": "1.43"
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{
"status": "affected",
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{
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{
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{
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{
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"version": "1.48"
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{
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{
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"version": "1.50"
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{
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"version": "1.51"
},
{
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"version": "1.52"
},
{
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"version": "1.53"
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{
"status": "affected",
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},
{
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"version": "1.56"
},
{
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"version": "1.57"
},
{
"status": "affected",
"version": "1.58"
},
{
"status": "affected",
"version": "1.59"
},
{
"status": "affected",
"version": "1.60"
},
{
"status": "affected",
"version": "1.61"
},
{
"status": "affected",
"version": "1.62"
},
{
"status": "affected",
"version": "1.63"
},
{
"status": "affected",
"version": "1.64"
},
{
"status": "affected",
"version": "1.65"
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{
"status": "affected",
"version": "1.66"
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{
"status": "affected",
"version": "1.67"
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{
"status": "affected",
"version": "1.68"
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{
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"version": "1.69"
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"version": "1.70"
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{
"status": "affected",
"version": "1.71"
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{
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"version": "1.72"
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{
"status": "affected",
"version": "1.73"
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{
"status": "affected",
"version": "1.74"
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{
"status": "affected",
"version": "1.75"
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{
"status": "affected",
"version": "1.76"
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{
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"version": "1.77"
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{
"status": "affected",
"version": "1.78"
},
{
"status": "affected",
"version": "1.79"
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{
"status": "affected",
"version": "1.80"
},
{
"status": "affected",
"version": "1.81"
},
{
"status": "affected",
"version": "1.82"
},
{
"status": "affected",
"version": "1.83"
},
{
"status": "affected",
"version": "1.84"
},
{
"status": "affected",
"version": "1.85"
},
{
"status": "affected",
"version": "1.86"
},
{
"status": "affected",
"version": "1.87"
},
{
"status": "affected",
"version": "1.88"
},
{
"status": "affected",
"version": "1.89"
},
{
"status": "affected",
"version": "1.90"
},
{
"status": "affected",
"version": "1.91"
},
{
"status": "affected",
"version": "1.92"
},
{
"status": "affected",
"version": "1.93"
},
{
"status": "affected",
"version": "1.94"
}
]
}
],
"credits": [
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"lang": "en",
"type": "reporter",
"value": "nathan2 (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
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}
],
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"providerMetadata": {
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"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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{
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"tags": [
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],
"url": "https://vuldb.com/vuln/370842/cti"
},
{
"name": "CVE-2026-12200 | CVE Analysis and Report",
"tags": [
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"url": "https://vuldb.com/cve/CVE-2026-12200"
},
{
"name": "Submit #829894 | RITLabs TinyWeb 1.94 Stack-based Buffer Overflow",
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"time": "2026-06-14T13:44:51.000Z",
"value": "VulDB entry last update"
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"title": "Ritlabs TinyWeb Server Header libeay32.dll.html stack-based overflow"
}
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"datePublished": "2026-06-15T00:15:08.714Z",
"dateReserved": "2026-06-14T11:39:38.478Z",
"dateUpdated": "2026-06-15T00:15:08.714Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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