CVE-2026-3764
Published: 08 March 2026
Summary
CVE-2026-3764 is a medium-severity Incorrect Privilege Assignment (CWE-266) vulnerability in Lerouxyxchire Client Database Management System. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 20.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-24 (Access Control Decisions).
Deeper analysis
CVE-2026-3764 is an improper authorization vulnerability (CWE-266, CWE-285) in SourceCodester Client Database Management System 1.0, published on 2026-03-08. The issue affects an unknown function within the file /superadmin_user_update.php. It carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), indicating high severity due to its network accessibility and low complexity.
Remote attackers require no privileges or user interaction to exploit the vulnerability over the network. Successful exploitation enables limited impacts on confidentiality, integrity, and availability, stemming from the improper authorization flaw. A proof-of-concept exploit has been publicly disclosed and may be utilized by attackers.
Advisories and details are available via VulDB entries at https://vuldb.com/?ctiid.349742, https://vuldb.com/?id.349742, and https://vuldb.com/?submit.768195, along with a GitHub Gist containing the exploit at https://gist.github.com/Adarshh-A/77dedc295e377e0492d15071e9bb2498. The vendor site is at https://www.sourcecodester.com/. No specific patches or mitigations are detailed in the provided information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-10267
Vulnerability details
A vulnerability was determined in SourceCodester Client Database Management System 1.0. The impacted element is an unknown function of the file /superadmin_user_update.php. This manipulation causes improper authorization. The attack can be initiated remotely. The exploit has been publicly disclosed and…
more
may be utilized.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper authorization vulnerability in a network-accessible web app (/superadmin_user_update.php) with no required privileges or interaction directly matches exploitation of public-facing applications.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces approved authorizations on functions such as /superadmin_user_update.php, blocking the unauthorized remote updates that define CVE-2026-3764.
Limits privileges so that the superadmin update path cannot be reached without explicit assignment, reducing the impact of the missing authorization check.
Requires the system to make and enforce explicit access-control decisions before allowing modifications to user records, directly addressing the CWE-285 flaw.