PatchTheCVECVE-2023-29487: An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and 2.6.9 and before on mac
CVE-2023-29487 is a critical-severity flaw (CVSS 9.1) affecting thor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 cause a denial of service (DoS) via the Threat To Process Correlation threat prevention module. NOTE: Heimdal asserts this is not a valid vulnerability. Their DNS Security for Endpoint solution includes an optional feature to provide extra information on the originating process that made a DNS request. The lack of
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-1333 |
| Published | 2023-12-21 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-29487?
thor: upgrade to newer than 3.5.3. Exact commands for each OS are on this page.
Is CVE-2023-29487 being exploited?
CVE-2023-29487 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-29487 affect?
CVE-2023-29487 affects thor. Severity is critical (CVSS 9.1). 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 cause a denial of service (DoS) via the Threat To Process Correlation threat prevention module. NOTE: Heim
How urgent is CVE-2023-29487?
Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Windows vulnerabilities · macOS vulnerabilities
Related CVEs
- CVE-2023-29486 CRITICAL 9.8 UPGRADE An issue was discovered in Heimdal Thor agent versions 3.4.2 and before 3.7.0 on Windows, allows attackers to
- CVE-2023-29485 CRITICAL 9.8 UPGRADE An issue was discovered in Heimdal Thor agent versions 3.4.2 and before on Windows and 2.6.9 and before on mac