High severity7.5NVD Advisory· Published Oct 28, 2022· Updated Jun 17, 2026
CVE-2021-38399
CVE-2021-38399
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6- cpe:2.3:o:honeywell:application_control_environment_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:honeywell:c200_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:honeywell:c200e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:honeywell:c300_firmware:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
2- www.cisa.gov/uscert/ics/advisories/icsa-21-278-04nvdThird Party AdvisoryUS Government Resource
- www.honeywellprocess.com/library/support/notifications/Customer/SN2021-02-22-01-Experion-C300-CCL.pdfnvdProduct
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