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CVE-2021-23140

25
FAUCET Score

CVE-2021-23140 is an Improper Authorization vulnerability in Gallagher Command Centre Server versions 8.40 prior to 8.40.1888, 8.30 prior to 8.30.1359, 8.20 prior to 8.20.1259, and all 8.10 and earlier versions, allowing unauthorized operators to modify command line macros. This vulnerability carries a high CVSS score of 8.8, indicating a network-based attack with low privileges and no user interaction, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.10CPE match
cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
>= 8.20, < 8.20.1259CPE matchmatch criteria
cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
>= 8.30, < 8.30.1359CPE matchmatch criteria
cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
>= 8.40, < 8.40.1888CPE matchmatch criteria
cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 49th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

security.gallagher.com / Security-Advisories/CVE-2021-23140
Vendor Advisory