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PatchSiren cyber security CVE debrief

CVE-2026-6349 HGiga CVE debrief

A critical OS command injection vulnerability in HGiga iSherlock allows unauthenticated local attackers to execute arbitrary commands on affected servers. The vulnerability, rated CVSS 9.3 (Critical), was disclosed by Taiwan's TW-CERT in April 2026 and remains in 'Deferred' status in NVD as of May 2026. The weakness stems from improper neutralization of special elements used in OS commands (CWE-78). Organizations using iSherlock should apply vendor patches immediately and restrict local access to the application.

Vendor
HGiga
Product
iSherlock-base-4.5
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-16
Original CVE updated
2026-05-19
Advisory published
2026-04-16
Advisory updated
2026-05-19

Who should care

Organizations running HGiga iSherlock security or network management platforms; system administrators responsible for iSherlock deployments; security teams monitoring for command injection vulnerabilities in enterprise security appliances; incident response teams tracking Taiwanese CERT advisories.

Technical summary

HGiga iSherlock contains an OS command injection vulnerability (CWE-78) that permits unauthenticated local attackers to inject and execute arbitrary operating system commands on the underlying server. The vulnerability carries a CVSS 4.0 score of 9.3 (Critical), indicating severe impact to confidentiality, integrity, and availability. The attack vector is network-accessible with low attack complexity, requiring no privileges or user interaction. The vulnerability was publicly disclosed by Taiwan's Computer Emergency Response Team/Coordination Center (TW-CERT) on April 16, 2026, with advisories published in both English and Traditional Chinese. As of May 19, 2026, the NVD entry remains in 'Deferred' status, suggesting ongoing analysis or vendor coordination.

Defensive priority

critical

Recommended defensive actions

  • Apply vendor-supplied security patches for HGiga iSherlock immediately upon availability
  • Restrict local system access to authorized administrators only
  • Monitor for suspicious command execution activity on iSherlock servers
  • Review application logs for indicators of OS command injection attempts
  • Contact HGiga support for patch availability if not already deployed

Evidence notes

Vulnerability disclosed by TW-CERT with official advisories in English and Traditional Chinese. NVD entry shows 'Deferred' status with CVSS 4.0 vector. Vendor attribution to HGiga based on source references.

Official resources

public