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HIGH · CVSS 7.3 CISA Known Exploited Vulnerability

CVE-2026-105133

Ahsay AhsayCBS Improper Authentication Vulnerability

Ahsay AhsayCBS

A vulnerability was detected in Ahsay AhsayCBS up to 10.3.2. 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 10.3.4 is able to mitigate this issue. It is recommended to upgrade the affected component.

CVSS
7.3
HIGH
EPSS
0.9%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
4 Oct 2026
CWE-287

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 14 October 2026. US federal agencies were required to remediate it by 17 October 2026.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 0.9%, which is higher than 57.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Frequently asked questions

Is CVE-2026-105133 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2026-105133.

What does CVE-2026-105133 affect?

CVE-2026-105133 affects Ahsay AhsayCBS. A vulnerability was detected in Ahsay AhsayCBS up to 10.3.2. 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 10.3.4 is able to mitigate this issue. It is recommended to upgrade the affected component.

How severe is CVE-2026-105133?

CVE-2026-105133 is rated HIGH with a CVSS base score of 7.3. EPSS puts the probability of exploitation in the next 30 days at 0.9%, higher than 57.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 17 October 2026.

How should organisations respond to CVE-2026-105133?

Apply the vendor patch for Ahsay AhsayCBS as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.