TI-2023-13857 Aliases CVE-2023-29485 GHSA-59fq-5jw2-685q

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

MEDIUM 44CWE-306Published 2023-12-21 · Updated 2024-09-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.

Summary

An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and 2.6.9 and before on macOS, allows attackers to bypass network filtering, execute arbitrary code, and obtain sensitive information via DarkLayer Guard threat prevention module. NOTE: Heimdal disputes the validity of this issue arguing that their DNS Security for Endpoint filters DNS traffic on the endpoint by intercepting system-generated DNS requests. The product was not designed to intercept DNS requests from third-party solutions.

Why it matters now

EPSS 0.00953 61st 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

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:heimdalsecurity:thor::::::::	up to 3.5.3	Vulnerable	Heimdalsecurity
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft
cpe:2.3:a:heimdalsecurity:thor::::::::	up to 2.6.9	Vulnerable	Heimdalsecurity
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple

cpe:2.3:a:heimdalsecurity:thor:*:*:*:*:*:*:*:* Versions up to 3.5.3 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

2026-10-02 Threatist record created from CVE-2023-29485
2026-10-03 Alias added: GHSA-59fq-5jw2-685q

References

Exploit 1

https://medium.com/%40drabek.a/weaknesses-in-heimdal-thors-line-of-products-9d0e5095fb93

TI-2023-13858 An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows… CVSS 3.1CRITICAL 9.8
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-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