CVE-2023-22439Network attack vector

Diagnostic web interface interruption via oversized HTTP request

Published Dec 18, 2023 · Updated Aug 2, 2024

Improper input validation in Gallagher Controller 6000 and Controller 7000 allows remote attackers to stop the diagnostic web interface. The optional port 80 interface accepts an oversized HTTP request without adequate size validation, causing its diagnostic web service to become unavailable. The interface must be enabled, and exploitation interrupts only diagnostic web access; Gallagher reports activity only in test environments.

CVSS severity3.1
Low
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Gallagher Controller 6000 and Controller 7000 allows remote attackers to stop the diagnostic web interface. The optional port 80 interface accepts an oversized HTTP request without adequate size validation, causing its diagnostic web service to become unavailable. The interface must be enabled, and exploitation interrupts only diagnostic web access; Gallagher reports activity only in test environments.

The record

CVE
CVE-2023-22439
Published
Dec 18, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T0819
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.1GallagherCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T0819Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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