Which versions of PHP are affected by CVE-2026-4592?

Organizations using A security vulnerability should be aware of moderate risk from CVE-2026-4592, a improper authentication vulnerability rated CVSS 5.6.

Is there a public PoC exploit available for CVE-2026-4592?

Yes, a public proof-of-concept exploit is available for CVE-2026-4592. Prioritise patching immediately. EPSS: 0.1%.

PHP CVE-2026-4592

Q: What is the CVSS score of CVE-2026-4592?

CVE-2026-4592 has a CVSS 4.0 base score of 2.9 (Low). CVSS vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

EUVD-2026-14459 LOW

Improper Authentication (CWE-287)

2026-03-23 VulDB

PHP Authentication Bypass

2.9

CVSS 4.0

CVSS VectorNVD

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.3 (MEDIUM) 2.9 (LOW)

CVSS changed

Apr 24, 2026 - 16:37 NVD

5.6 (MEDIUM) 6.3 (MEDIUM)

PoC Detected

Mar 24, 2026 - 15:54 vuln.today

Public exploit code

EUVD ID Assigned

Mar 23, 2026 - 16:15 euvd

EUVD-2026-14459

Analysis Generated

Mar 23, 2026 - 16:15 vuln.today

CVE Published

Mar 23, 2026 - 15:56 nvd

MEDIUM 5.6

DescriptionNVD

A security vulnerability has been detected in kalcaddle kodbox 1.64. This impacts the function loginAfter/tfaVerify of the file /workspace/source-code/plugins/client/controller/tfa/index.class.php of the component Password Login. The manipulation leads to improper authentication. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is said to be difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Improper authentication in the two-factor authentication verification function of Kalcaddle Kodbox 1.64 allows remote attackers to bypass login controls with high complexity exploitation. Public exploit code exists for this vulnerability, and the vendor has not provided a patch despite early notification. …

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Audit authentication configurations.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-4592 vulnerability details – vuln.today

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