CVE-2023-6355

Local debug access via incorrect fuse selection

Published Dec 18, 2023 · Updated Aug 2, 2024

Incorrect fuse selection in Gallagher Controller 7000 releases 8.70, 8.80, 8.90, and 9.00 allows physically proximate attackers to enable local debug. The platform programs incorrect fuse values, leaving hardware protection mechanisms bypassable through physical access to the controller's local debug facility. Successful exploitation grants debug-level access that can compromise controller confidentiality, integrity, and availability.

CVSS severity6.8
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect fuse selection in Gallagher Controller 7000 releases 8.70, 8.80, 8.90, and 9.00 allows physically proximate attackers to enable local debug. The platform programs incorrect fuse values, leaving hardware protection mechanisms bypassable through physical access to the controller's local debug facility. Successful exploitation grants debug-level access that can compromise controller confidentiality, integrity, and availability.

The record

CVE
CVE-2023-6355
Published
Dec 18, 2023
Updated
Aug 2, 2024
Vendor
Gallagher Security
Product
Controller 7000
Classifications
CWE-863, CWE-1253
Attack vector
physical
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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.70 <vCR8.70.231204a
  2. Affected versionversion=8.80 <vCR8.80.231204a
  3. Affected versionversion=8.90 <vCR8.90.231204a
  4. Affected versionversion=9.00 <vCR9.00.231204b

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Gallagher Security · Controller 7000version=8.70 <vCR8.70.231204a; version=8.80 <vCR8.80.231204a; version=8.90 <vCR8.90.231204a; version=9.00 <vCR9.00.231204b

Published CVSS scores

6.8Gallagher Group Ltd.CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-1253Incorrect Selection of Fuse Values

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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