CVE-2026-105133
MediumExploitedPublic exploitAhsay AhsayCBS API ApiStructsAction.java checkSysPwd improper authentication
Published Oct 4, 2026 · Updated Oct 15, 2026 · Also known as EUVD-2026-92079, GHSA-fp2j-3cmp-828j
Key Facts
Patch immediately- CVE-2026-105133 is a medium-severity vulnerability (CVSS 6.9 v4) affecting AhsayCBS, Cloud Backup Suite (Ahsay).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 9, 2026. Public exploit code is available.
- EPSS estimates a 0.9% probability of exploitation in the next 30 days.
- Fixed versions are available, including Cloud Backup Suite 10.3.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
6.9
CVSS: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:P
EPSS (30-day exploit likelihood)
0.9%
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-105133 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 14, 2026 | Oct 17, 2026 | Not reported |
| Industry KEV feed | Oct 9, 2026 | Oct 17, 2026 | Not reported |
| CIRCL KEV | Oct 9, 2026 | Oct 17, 2026 | Not reported |
| ENISA EUVD | Oct 14, 2026 | n/a | Not reported |
Required action: 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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| AhsayCBSAhsay | See advisory | n/a |
| Cloud Backup SuiteAhsay | See advisory | 10.3.4 |
Patched Releases
Cloud Backup Suite
10.3.4
Timeline
Publicly disclosed
Oct 4, 2026
Added to Industry KEV feed
Oct 9, 2026
Added to CIRCL KEV
Oct 9, 2026
Added to CISA KEV
Oct 14, 2026
Added to ENISA EUVD
Oct 14, 2026
Last updated
Oct 15, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- advisoryCVE-2026-105133 | CVE Analysis and Report
- advisorySubmit #942688 | Ahsay Systems Corporation Limited AhsayCBS 10.0.3 Authentication Bypass
- patchhttps://www.ahsay.com/en/support/help-centre/release-notes/cbs/v10.3.4
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
A vulnerability was detected in Ahsay AhsayCBS up to 10.3.2.
Affected: AhsayCBS; Cloud Backup Suite (Ahsay). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 9, 2026.
Yes. It was added on Oct 14, 2026 with a federal remediation due date of Oct 17, 2026.
Public exploit code is available.
Fixed versions are available, including Cloud Backup Suite 10.3.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-105133 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo