Read the docs
TI-2023-13858 Aliases CVE-2023-29486GHSA-frjf-28g7-3864

An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows…

Priority HIGH 82CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-1333.

Summary

An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows, allows attackers to bypass USB access restrictions, execute arbitrary code, and obtain sensitive information via Next-Gen Antivirus component. NOTE: Heimdal argues that the limitation described here is a Microsoft Windows issue, not a Heimdal specific vulnerability. The USB control solution by Heimdal is meant to manage Microsoft Windows native USB restrictions. They maintain that their solution functions as a management layer over Windows settings and is not to blame for limitations in Windows' detection capabilities.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0103 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:heimdalsecurity:thor:*:*:*:*:*:*:*:*before 3.7.0VulnerableHeimdalsecurity
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:heimdalsecurity:thor:*:*:*:*:*:*:*:*up to 2.6.9VulnerableHeimdalsecurity
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
  • cpe:2.3:a:heimdalsecurity:thor:*:*:*:*:*:*:*:* Versions before 3.7.0 Vulnerable ·Heimdalsecurity
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:heimdalsecurity:thor:*:*:*:*:*:*:*:* Versions up to 2.6.9 Vulnerable ·Heimdalsecurity
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-29486
  2. 2026-10-03 Alias added: GHSA-frjf-28g7-3864

References

Exploit 1

  • TI-2023-13859 An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and… CVSS 3.1CRITICAL 9.1
  • TI-2023-13857 An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and… CVSS 3.1CRITICAL 9.8
  • TI-2019-05994 Heimdal Thor Agent 2.5.17x before 2.5.173 does not verify X.509 certificates from TLS… CVSS 3.0CRITICAL 9.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences