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CVE-2023-5403· NVD / CVE Program· CNA Honeywell

Server hostname translation to IP address manipulation which could lead to an attacker performing remote code execution or causing a failure

Server hostname translation to IP address manipulation which could lead to an attacker performing remote code execution or causing a failure. See Honeywell Security Notification for recommendations on upgrading and versioning.

HighCVSS 8.1 · v3.1—No exploit No fix recorded
Published
Apr 17, 2024
Updated
Jun 17, 2026
EPSS
0.7% · 52th percentile
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Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Honeywell
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
honeywellexperion server

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Honeywell). Independent of NVD's CPE analysis and usually ahead of it.

  • Honeywell Experion Server

    • 520.2 and later · up to and including 520.2 TCU4affected · semver
    • 510.1 and later · up to and including 510.2 HF13affected · semver
    • 520.1 and later · up to and including 520.1 TCU4affected · semver
    • 511.1 and later · up to and including 511.5 TCU4 HF3affected · semver
    • 520.2 and later · up to and including 520.2 TCU4affected · semver
    • 511.1 and later · up to and including 511.5 TCU4 HF3affected · semver
    • 520.1 and later · up to and including 520.1 TCU4affected · semver
    • 520.2 and later · up to and including 520.2 TCU4affected · semver
    • 520.1 and later · up to and including 520.1 TCU4affected · semver
    • 520.2 TCU4 HFR2 and later · up to and including 511.5 TCU4 HF3affected · semver

Same product

honeywell: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-5404Server receiving a malformed message can cause a pointer to be overwritten which can result in a remote code execution or failure.
    32Monitor
  • CVE-2023-5401Server receiving a malformed message based on a using the specified key values can cause a stack overflow vulnerability which could lead to
    32Monitor
  • CVE-2023-5400Server receiving a malformed message based on a using the specified key values can cause a heap overflow vulnerability which could lead to a
    32Monitor
  • CVE-2023-5397Server receiving a malformed message to create a new connection could lead to an attacker performing remote code execution or causing a fail
    32Monitor
  • CVE-2023-5395Server receiving a malformed message that uses the hostname in an internal table may cause a stack overflow resulting in possible remote cod
    32Monitor
  • CVE-2023-25948Server Data type confusion - info leak
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-53950 days apartServer receiving a malformed message that uses the hostname in an internal table may cause a stack overflow resulting in possible remote cod
    32Monitor
  • CVE-2023-54010 days apartServer receiving a malformed message based on a using the specified key values can cause a stack overflow vulnerability which could lead to
    32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records