Security readout for executives and security teams
Plain-English summary
CVE-2021-23146 affects Gallagher Command Centre systems used for physical access control. A flaw in Controller verification can let an attacker bypass PIV verification, weakening badge-based identity assurance. The business impact is unauthorized physical-access approval in affected deployments, not data theft.
Executive priority
Treat this as a high-priority physical security remediation if Gallagher Command Centre manages sensitive facilities. The main concern is integrity of access decisions, so prioritize sites where unauthorized entry would create safety, regulatory, or operational risk.
Technical view
The issue is an incomplete comparison with missing factors in Gallagher Controller PIV verification. Affected Command Centre releases include 8.40 before 8.40.1888, 8.30 before 8.30.1359, 8.20 before 8.20.1259, 8.10 before 8.10.1284, and 8.00 or earlier. CVSS 3.1 is 7.1 with adjacent attack vector and high integrity impact.
Likely exposure
Exposure is likely limited to organizations running affected Gallagher Command Centre versions with Gallagher Controllers performing PIV verification. Risk is higher at facilities where PIV-based physical access decisions protect sensitive areas.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV. The CVSS vector indicates low complexity, no privileges, and no user interaction, but an adjacent access position is required.
Researcher notes
Public details are limited. The sources identify the weakness class, affected versions, fixed version thresholds, CVSS vector, and PIV verification bypass impact, but not exploit mechanics. Avoid assuming remote internet exploitability or broader Gallagher product impact without vendor confirmation.
Mitigation direction
- Upgrade Gallagher Command Centre to the fixed version for the deployed branch or later.
- Review Gallagher’s advisory for version-specific installation and operational guidance.
- Prioritize remediation for facilities relying on PIV for access control decisions.
- Limit controller and management-plane exposure to trusted access-control networks.
- Document remediation status for each affected site or controller group.
Validation and detection
- Inventory deployed Gallagher Command Centre versions across all facilities.
- Confirm versions meet or exceed 8.40.1888, 8.30.1359, 8.20.1259, or 8.10.1284.
- Identify any remaining 8.00 or earlier deployments for urgent upgrade planning.
- Review access-control logs for unexpected PIV approvals or abnormal verification behavior.
- Confirm post-upgrade PIV verification behavior with approved administrative test procedures.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1023: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-23146 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L2.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://security.gallagher.com/Security-Advisories/CVE-2021-23146CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.