CVE-2026-107613

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["TightVNC Server (Win8/DXGI screen driver)"], "platforms": ["Windows"], "product": "TightVNC", "programFiles": ["Win8ScreenDriver.cpp"], "programRoutines": [{"name": "Win8ScreenDriver::applyNewScreenProperties()"}, {"name": "Win8ScreenDriver::executeDetection()"}, {"name": "Win8ScreenDriver::getScreenBuffer()"}, {"name": "Win8ScreenDriver::grabFb()"}, {"name": "Win8ScreenDriver::getScreenPropertiesChanged()"}, {"name": "Win8ScreenDriver::getCursorPosition()"}], "vendor": "GlavSoft", "versions": [{"lessThan": "2.8.88", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A NULL pointer dereference vulnerability in the Win8ScreenDriver component of GlavSoft TightVNC Server for Windows before 2.8.88 allows an attacker to crash the server, causing a denial of service. When re-initialization of the DXGI Desktop Duplication driver fails in applyNewScreenProperties() (for example after a GPU reset, display hot-plug or session change), m_drvImpl is left NULL and is subsequently dereferenced without a check by executeDetection(), getScreenBuffer(), grabFb(), getScreenPropertiesChanged() and getCursorPosition()."}], "id": "CVE-2026-107613", "lastModified": "2026-10-08T21:10:00.133", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-107613", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-08T14:01:21.134363Z", "version": "2.0.3"}}]}, "published": "2026-10-08T14:16:50.020", "references": [{"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "url": "https://sourceforge.net/p/vnc-tight/bugs/1660/"}, {"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "url": "https://www.tightvnc.com/whatsnew.php"}], "sourceIdentifier": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["windows"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,2.8.88)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "TightVNC", "source": "cna", "vendor": "GlavSoft"}, "product": "tightvnc", "vendor": "glavsoft"}], "created": "2026-10-08T16:15:14.553173+00:00", "updated": "2026-10-09T08:05:05.956051+00:00", "vendors": ["glavsoft", "glavsoft$PRODUCT$tightvnc"]}