CVE-2023-22439

3.1 LOW 0.5% exploit odds Fix listed

What it is

Improper input validation of a large HTTP request in the Controller 6000 and Controller 7000 optional diagnostic web interface (Port 80) can be used to perform a Denial of Service of the diagnostic web interface. This issue affects: Gallagher Controller 6000 and 7000 8.90 prior to vCR8.90.231204a (distributed in 8.90.1620 (MR2)), 8.80 prior to vCR8.80.231204a (distributed in 8.80.1369 (MR3)), 8.70 prior to vCR8.70.231204a (distributed in 8.70.2375 (MR5)), 8.60 prior to vCR8.60.231116a (distributed in 8.60.2550 (MR7)), all versions of 8.50 and prior.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-12-18 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:35 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 3.1 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-12-18 22:15 UTC
Last modified: 2026-06-17 05:35 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-20 · Improper input validation
Record status: Modified

Affected

Gallagher Controller 6000 Firmware ≤ 8.50
Gallagher Controller 6000 Firmware < 8.60.231116a
Gallagher Controller 6000 Firmware < 8.70.231204a
Gallagher Controller 6000 Firmware < 8.80.231204a
Gallagher Controller 6000 Firmware < 8.90.231204a
Gallagher Command Centre ≤ 8.50
Gallagher Command Centre < 8.60.231116a
Gallagher Command Centre < 8.70.231204a

Attack profile CVSS 3.1 · 3.1

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record