Security readout for executives and security teams
Plain-English summary
An authenticated Command Centre Operator could change command line macros without proper authorization. That can undermine control over sensitive server-side actions and create serious business risk where Gallagher Command Centre is operationally important.
Executive priority
Prioritize remediation for any production Command Centre deployment because the CVSS score is critical and the flaw affects authorization around command line macros. Treat operator account security and upgrade planning as urgent.
Technical view
CVE-2021-23140 is a CWE-285 improper authorization issue in Gallagher Command Centre Server. CVSS 3.1 is 9.9: network attack vector, low complexity, low privileges required, no user interaction, changed scope, high confidentiality and integrity impact, and low availability impact.
Likely exposure
Deployments using Gallagher Command Centre 8.40 before 8.40.1888 MR3, 8.30 before 8.30.1359 MR3, 8.20 before 8.20.1259 MR5, or 8.10 and earlier should be treated as exposed.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires at least a Command Centre Operator account, so account compromise or insider misuse are the most relevant scenarios.
Researcher notes
Evidence is limited to the CVE record and Gallagher advisory metadata. The sources identify affected and fixed version thresholds, impact scoring, and authorization weakness, but do not provide exploit details, indicators of compromise, or confirmed exploitation.
Mitigation direction
- Upgrade affected Command Centre versions to the fixed maintenance release or later.
- Move Command Centre 8.10 and earlier to a vendor-supported fixed version.
- Review Gallagher's advisory for version-specific upgrade guidance.
- Limit operator access to trusted users until remediation is complete.
- Audit macro permissions and recent macro changes.
Validation and detection
- Inventory all Gallagher Command Centre Server versions in use.
- Compare versions against the affected release ranges in the advisory.
- Identify users with Command Centre Operator access.
- Review command line macro change history for unexpected modifications.
- Confirm remediation by documenting upgraded fixed versions.
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-285: 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-2021-23140 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
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/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:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://security.gallagher.com/Security-Advisories/CVE-2021-23140CVE 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.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.