What is the CVSS score of CVE-2026-3764?

CVE-2026-3764 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-3764?

Yes, a public proof-of-concept exploit is available for CVE-2026-3764. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-3764?

Within 24 hours: Immediately disable or restrict access to /superadmin_user_update.php via firewall rules and verify superadmin account integrity for unauthorized modifications. Within 7 days: Implement WAF rules to block requests to the vulnerable endpoint, conduct forensic audit of superadmin account change logs, and initiate vendor contact for emergency patch timeline. Within 30 days: Develop migration plan to alternative database management solution or deploy compensating network controls; maintain daily monitoring of superadmin activity until patch availability.

Client Database Management System CVE-2026-3764

MEDIUM

Incorrect Privilege Assignment (CWE-266)

2026-03-08 cna@vuldb.com

PHP Information Disclosure Client Database Management System Lerouxyxchire

5.5

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send unauthenticated HTTP request
Delivery

Access /superadmin_user_update.php endpoint
Exploit

Bypass authorization checks
Execution

Modify superadmin user account
Impact

Gain elevated privileges

Vulnerability Assessment

Weakness	CWE CWE-266 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V8 - Authorization Privilege assignment review
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against default configurations of SourceCodester Client Database Management System 1.0 with /superadmin_user_update.php accessible without authentication.
Impact	CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation requires authentication. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Improper authorization in SourceCodester Client Database Management System 1.0 allows unauthenticated remote attackers to manipulate the /superadmin_user_update.php file, potentially gaining unauthorized access to sensitive functionality. Public exploit code exists for this vulnerability, and no patch is currently available, leaving affected installations at immediate risk.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.3

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. [CVSS 7.3 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Affects Client Database Management System. 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 may be utilized.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

HIGH MEDIUM

CVSS changed

Apr 29, 2026 - 01:11 NVD

7.3 (HIGH) 5.5 (MEDIUM)

PoC Detected

Mar 09, 2026 - 16:30 vuln.today

Public exploit code

CVE Published

Mar 08, 2026 - 20:15 nvd

HIGH 7.3

DescriptionCVE.org

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 may be utilized.

Executive ViewAI

Why It Matters

A high-severity vulnerability in SourceCodester Client Database Management System 1.0 allows unauthorized modification of superadmin user accounts with no patch currently available. This poses immediate risk to organizations using this system, as attackers can exploit publicly available proof-of-concept code to compromise administrative access and potentially exfiltrate or manipulate sensitive client data.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to block POST/GET requests to /superadmin_user_update.php; restrict network access to the application to trusted internal IP ranges only; disable the vulnerable administrative update functionality if operationally feasible; enforce multi-factor authentication on all superadmin accounts; implement real-time alerting on superadmin account modifications; conduct daily audit log reviews of administrative changes.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +28

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.