Honeywell Experion PKS and ACE Controllers Unrestricted Upload of File with Dangerous Type
Priority MEDIUM 51CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
Honeywell Experion PKS C200, C200E, C300, and ACE controllers are vulnerable to unrestricted file uploads, which may allow an attacker to remotely execute arbitrary code and cause a denial-of-service condition.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01183 67th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Honeywell | Experion PKS | C200; C200E; C300; ACE controllers | — | No fix listed | CNA |
- Experion PKS VendorHoneywell Affected C200; C200E; C300; ACE controllers Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:honeywell:c200_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Honeywell |
| cpe:2.3:h:honeywell:c200:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Honeywell |
| cpe:2.3:o:honeywell:c200e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Honeywell |
| cpe:2.3:h:honeywell:c200e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Honeywell |
| cpe:2.3:o:honeywell:c300_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Honeywell |
| cpe:2.3:h:honeywell:c300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Honeywell |
| cpe:2.3:o:honeywell:application_control_environment_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Honeywell |
| cpe:2.3:h:honeywell:application_control_environment:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Honeywell |
- cpe:2.3:o:honeywell:c200_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Honeywell
- cpe:2.3:h:honeywell:c200:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Honeywell
- cpe:2.3:o:honeywell:c200e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Honeywell
- cpe:2.3:h:honeywell:c200e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Honeywell
- cpe:2.3:o:honeywell:c300_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Honeywell
- cpe:2.3:h:honeywell:c300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Honeywell
- cpe:2.3:o:honeywell:application_control_environment_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Honeywell
- cpe:2.3:h:honeywell:application_control_environment:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Honeywell
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-38397
- 2026-10-03 Alias added: GHSA-j77h-24p8-j3g2
References
More Honeywell Application Control Environment Firmware vulnerabilities
- TI-2021-15999 Honeywell Experion PKS and ACE Controllers Injection CVSS 3.1CRITICAL 9.8
- TI-2021-16003 Honeywell Experion PKS and ACE Controllers Relative Path Traversal CVSS 3.1HIGH 7.5
Sources
- CVE-2021-38397 · CVE Program
- CVE-2021-38397 · NVD
- FIRST EPSS
- GHSA-j77h-24p8-j3g2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences