CVE-2026-105133
Ahsay AhsayCBS Improper Authentication Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 October 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS: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:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 79.47% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 14 October 2026 · due 17 October 2026
- Weakness
- CWE-287
- Affected
- ahsay/cloud backup suite
- Source
- cna@vuldb.com
EPSS moved from 0.4% on 4 October 2026 to 79.5% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. https://www.ahsay.com/en/company/announcements/patch-cve-105133-105134-update ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-105133
References
- https://vuldb.com/cve/CVE-2026-105133Third Party Advisory, VDB Entry
- https://vuldb.com/submit/942688Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/413350Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/413350/ctiPermissions Required, VDB Entry
- https://www.ahsay.com/en/company/announcements/patch-cve-105133-105134-updateVendor Advisory
- https://www.huntress.com/blog/ahsaycbs-flaws-exploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-105133US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.