TVicPort64.sys Privilege Escalation via Malformed IOCTL Requests

An issue in the TVicPort64.sys component of EnTech Taiwan TVicPort Product v4.0, File v5.2.1.0 allows attackers to escalate privileges via sending crafted IOCTL 0x80002008 requests.

Casky was already ahead

This CVE exploits attack patterns that Casky's 397matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

TVicPort64.sys, a kernel-mode driver component in EnTech Taiwan's TVicPort product (v4.0, file v5.2.1.0), contains an input validation flaw (CWE-20) that permits unauthenticated local attackers to escalate privileges by sending specially crafted IOCTL 0x80002008 requests. This vulnerability carries a CVSS 7.8 high severity rating and affects any system running the vulnerable driver version—particularly organizations using TVicPort for hardware port access and monitoring. The lack of proper input validation combined with insufficient access controls (CWE-269) means a low-privileged local user can craft malicious I/O control messages to manipulate kernel-mode operations, gaining elevated system privileges and potentially achieving full system compromise.

Casky's 397 matching skills leverage Claude AI's extended reasoning to correlate attack patterns across MITRE ATT&CK initial access (TA0001), persistence (TA0043), and privilege escalation (TA0004) techniques. Practitioners querying Casky would observe detection signatures mapping to T1574 (Hijack Execution Flow), T1547 (Boot or Logon Autostart Execution), and T1134 (Access Token Manipulation)—all executable pathways once the IOCTL vulnerability grants kernel access. The platform's multi-technique correlation identifies that successful exploitation appears as abnormal kernel driver communication patterns followed by privilege token elevation, enabling security teams to distinguish this CVE's specific attack chain from generic privilege escalation attempts and prioritize kernel-level monitoring and driver integrity controls.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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397 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-30769.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

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threat intelligence · low

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analyzing-certificate-transparency-for-phishing

threat intelligence · low

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MITRE ATT&CK Techniques

TA0001 TA0043 TA0004

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