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CVE-2026-105133: Ahsay AhsayCBS Improper Authentication Vulnerability

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-10-14
• EPSS: 79.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-04 · updated 2026-10-26
• Weakness: CWE-287

Description

A vulnerability was detected in Ahsay AhsayCBS up to 9.15.2.69/10.3.4.44. This affects the function checkSysPwd of the file com/ahsay/obs/api/ApiStructsAction.java of the component API. Performing a manipulation of the argument random results in improper authentication. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading to version 9.15.2.70 and 10.3.4.45 is able to mitigate this issue. It is recommended to upgrade the affected component. The initial patch did not fix the security vulnerability properly. An update of the CVE entry to reflect this became necessary.

Affected products

• Ahsay Cloud Backup Suite: before 9.15.2.70; from 10.1.0 before 10.3.4.45 — fixed in 9.15.2.70, 10.3.4.45

How to fix

Upgrade to a fixed version: Ahsay Cloud Backup Suite 9.15.2.70, 10.3.4.45. Check the vendor advisory for mitigations.

References

• https://vuldb.com/cve/CVE-2026-105133
• https://vuldb.com/submit/942688
• https://vuldb.com/vuln/413350
• https://vuldb.com/vuln/413350/cti
• https://www.ahsay.com/en/company/announcements/patch-cve-105133-105134-update
• https://www.huntress.com/blog/ahsaycbs-flaws-exploit
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-105133

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