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CVE-2023-5400

23
FAUCET Score

CVE-2023-5400 is a heap overflow vulnerability that affects Honeywell products, allowing remote code execution or denial of service. It carries a high CVSS score of 8.1 due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While the vulnerability is considered active on the Hot List, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
HoneywellExperion Server
>= 511.1, <= 511.5 TCU4 HF3, >= 520.1, <= 520.1 TCU4, >= 520.2, <= 520.2 TCU4CNA affecteddefault unaffected
HoneywellExperion Server
>= 510.1, <= 510.2 HF13, >= 511.1, <= 511.5 TCU4 HF3, >= 520.1, <= 520.1 TCU4, >= 520.2, <= 520.2 TCU4CNA affecteddefault unaffected
HoneywellExperion Server
>= 520.2 TCU4 HFR2, <= 511.5 TCU4 HF3, >= 520.1, <= 520.1 TCU4, >= 520.2, <= 520.2 TCU4CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 20th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

process.honeywell.com