CVE-2021-38399
HIGHCVSS 7.5/10EPSS 0.74%
Last modified
CVE-2021-38399 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to relative path traversal, which may allow an attacker access to unauthorized files and directories.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.
Description
Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to relative path traversal, which may allow an attacker access to unauthorized files and directories.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Honeywell | C200 Firmware | All versions |
| Honeywell | C200e Firmware | All versions |
| Honeywell | C300 Firmware | All versions |
| Honeywell | Application Control Environment Firmware | All versions |
References
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-278-04Third Party Advisory, US Government Resource
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-278-04Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-38399?
Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to relative path traversal, which may allow an attacker access to unauthorized files and directories.
How severe is CVE-2021-38399?
CVE-2021-38399 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.
How do I fix CVE-2021-38399?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-38399?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST