Skip to content
Fencer Vulns
high 8.1

CVE-2023-5400 json

Server receiving a malformed message based on a using the specified key values can cause a heap overflow vulnerability which could lead to…

published 2024-04-17 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57715

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

Server receiving a malformed message based on a using the specified key values can cause a heap overflow vulnerability which could lead to an attacker performing remote code execution or causing a failure.  See Honeywell Security Notification for recommendations on upgrading and versioning.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-116-04 updated cvss 8.1

Honeywell Experion PKS, Experion LX, PlantCruise by Experion, Safety Manager, Safety Manager SC

  • Honeywell Experion LX <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell Experion PKS <R510.2_HF14, <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell PlantCruise by Experion <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell Safety Manager R15x, >=R16x, <=R162.10 Honeywell Safety Manager SC R210.X, R211.1, R211.2, R212.1
    affected: mitigation “Honeywell fixed the reported issues and advises users to upgrade to version referenced in the Security Notice or CVE record.” process.honeywell.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Honeywell Experion Server
  • honeywell experion_server

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.