The US Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-105133, a Ahsay AhsayCBS Improper Authentication Vulnerability, to its Known Exploited Vulnerabilities (KEV) catalog on October 14, 2026. CISA adds a flaw to the catalog when it has reliable evidence that attackers are exploiting it in the wild.
What CISA says
Ahsay AhsayCBS contains an improper authentication vulnerability that could allow a remote attacker to bypass authentication via manipulation of the random parameter in the API component’s checkSysPwd function. This vulnerability can be chained with CVE-2026-105134.
— CISA KEV catalog entry for CVE-2026-105133
Key facts
| CVE | CVE-2026-105133 |
|---|---|
| Vendor / product | Ahsay CBS |
| Added to KEV | October 14, 2026 |
| Federal deadline | October 17, 2026 |
| Known ransomware use | Unknown |
| Weakness (CWE) | CWE-287 |
| CISA forensic triage | No |
| CVSS base score (NVD) | 5.5 Medium |
| CVSS vector | 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Who has to act, and by when
US federal civilian executive branch agencies are required to remediate the vulnerability by October 17, 2026. CISA urges all organizations to prioritize KEV-listed flaws as part of their vulnerability management.
CISA’s required action for this entry:
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.
References
- CISA Known Exploited Vulnerabilities Catalog https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- NIST NVD — CVE-2026-105133 https://nvd.nist.gov/vuln/detail/CVE-2026-105133
- www.ahsay.com https://www.ahsay.com/en/company/announcements/patch-cve-105133-105134-update
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- www.cisa.gov https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk