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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2019-25600",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-03-22T12:59:37.342Z",
        "datePublished": "2026-03-22T13:38:36.517Z",
        "dateUpdated": "2026-03-24T15:14:43.698Z"
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                "dateUpdated": "2026-03-22T13:38:36.517Z"
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            "datePublic": "2019-04-14T00:00:00.000Z",
            "title": "UltraVNC Viewer 1.2.2.4 Denial of Service via Buffer Overflow",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect to trigger a buffer overflow that crashes the viewer."
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            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Out-of-bounds Write",
                            "cweId": "CWE-787",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Uvnc",
                    "product": "UltraVNC Viewer",
                    "versions": [
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                            "version": "1.2.2.4",
                            "status": "affected"
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                        "Recovery": "NOT_DEFINED",
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                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH",
                        "exploitMaturity": "NOT_DEFINED",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "PASSIVE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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                        "vulnIntegrityImpact": "NONE",
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                        "confidentialityImpact": "NONE",
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                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
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            ],
            "references": [
                {
                    "url": "https://www.exploit-db.com/exploits/46702",
                    "name": "ExploitDB-46702",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "url": "https://www.uvnc.com/",
                    "name": "Official Product Homepage",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "url": "https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html",
                    "name": "Product Reference",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "name": "VulnCheck Advisory: UltraVNC Viewer 1.2.2.4 Denial of Service via Buffer Overflow",
                    "tags": [
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                    ],
                    "url": "https://www.vulncheck.com/advisories/ultravnc-viewer-denial-of-service-via-buffer-overflow"
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                {
                    "lang": "en",
                    "value": "Victor Mondragón",
                    "type": "finder"
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                "metrics": [
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-24T14:09:29.459873Z",
                                "id": "CVE-2019-25600",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
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                                    {
                                        "Technical Impact": "partial"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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