CVE-2026-5794 PUBLISHED

Vulnerability in Cryptobox allows an authenticated user to trigger an account lockout

Assigner: THA-PSIRT
Reserved: 08.04.2026 Published: 28.04.2026 Updated: 28.04.2026

A vulnerability affecting the detailed versions of Cryptobox allows a legitimate user to prevent another to login by triggering an account lockout via sending a specially crafted request.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
CVSS Score: 4.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Ercom
Product	Cryptobox
Versions	Default: affected Version 4.40.175 is affected affected from 4.37.237 to 4.38.0 (excl.)

Solutions

Upgrade to version 4.40.177 or above.

References

https://info.cryptobox.com/doc/v4.40/4.40.en/

Problem Types

CWE-694 Use of multiple resources with duplicate identifier CWE

Impacts

CAPEC-2 Inducing Account Lockout