TI-2023-11730 Aliases CVE-2023-26597 GHSA-mxwr-w7j9-6428

Controller DOS on sending error response

MEDIUM 40CWE-400Published 2023-07-13 · Updated 2025-03-05

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

Controller DoS due to buffer overflow in the handling of a specially crafted message received by the controller. See Honeywell Security Notification for recommendations on upgrading and versioning. See Honeywell Security Notification for recommendations on upgrading and versioning.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00636 50th 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: Partial

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	C300	501.1 – 501.6HF8; 510.1 – 510.2HF12; 511.1 – 511.5TCU3; 520.1 – 520.1TCU4; 520.2 – 520.2TCU2	—	No fix listed	CNA
Honeywell	C300	510.1 – 511.5TCU3; 520.1 – 520.1TCU4; 520.2 – 520.2TCU2	—	No fix listed	CNA

C300 VendorHoneywell Affected 501.1 – 501.6HF8; 510.1 – 510.2HF12; 511.1 – 511.5TCU3; 520.1 – 520.1TCU4; 520.2 – 520.2TCU2 Fixed in — No fix listed CNA
C300 VendorHoneywell Affected 510.1 – 511.5TCU3; 520.1 – 520.1TCU4; 520.2 – 520.2TCU2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:honeywell:c300_firmware::::::::	501.1 – 501.6hf8; 510.1 – 510.2hf12; 511.1 – 511.5tcu3; 520.1 – 520.1tcu4; 520.2 – 520.2tcu2	Vulnerable	Honeywell
cpe:2.3:h:honeywell:c300:-:::::::*	not specified by NVD	Running on	Honeywell

cpe:2.3:o:honeywell:c300_firmware:*:*:*:*:*:*:*:* Versions 501.1 – 501.6hf8; 510.1 – 510.2hf12; 511.1 – 511.5tcu3; 520.1 – 520.1tcu4; 520.2 – 520.2tcu2 Vulnerable ·Honeywell
cpe:2.3:h:honeywell:c300:-:*:*:*:*:*:*:* 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-2023-26597
2026-10-03 Alias added: GHSA-mxwr-w7j9-6428
2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 1

https://process.honeywell.com

TI-2021-16001 Honeywell Experion PKS and ACE Controllers Unrestricted Upload of File with Dangerous Type CVSS 3.1CRITICAL 10.0
TI-2023-10101 Controller stack overflow when decoding messages from the server CVSS 3.1CRITICAL 9.8
TI-2021-15999 Honeywell Experion PKS and ACE Controllers Injection CVSS 3.1CRITICAL 9.8
TI-2023-11042 Controller stack overflow on decoding messages from the server CVSS 3.1CRITICAL 9.8
TI-2023-10640 Controller design flaw - unsigned firmware CVSS 3.1CRITICAL 9.8
TI-2021-16003 Honeywell Experion PKS and ACE Controllers Relative Path Traversal CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences