CVE-2026-105133: Ahsay AhsayCBS Improper Authentication Vulnerability

Headline from Ahsay — AhsayCBS · compiled from 5 sources

Huntress reports that attackers have been chaining CVE-2026-105133, an authentication bypass in the AhsayCBS backup console, with a second flaw to "conducting reconnaissance, dropping webshells, planting XMRig cryptominers masquerading as Microsoft Edge"[1]

According to VulDB, the flaw affects Ahsay AhsayCBS up to 10.3.2[2] and lies in the function checkSysPwd of the file com/ahsay/obs/api/ApiStructsAction.java of the component API[2]. VulDB says the attack can be initiated remotely[2] and that "the exploit is now public."[2]Huntress says NVD disclosed CVE-2026-105133 and CVE-2026-105134 on October 4, 2026[1], and that starting October 7 it saw threat actors exploiting the flaws for remote code execution[1]. By October 8, Huntress said, it had seen five organizations targeted[1].The firm describes the chain this way: CVE-2026-105133 is used to bypass authentication, and CVE-2026-105134 is then used to gain code execution[1]. Huntress says the second flaw can give attackers "unauthenticated remote code execution as NT AUTHORITY/SYSTEM"[1]. Huntress calls CVE-2026-105133 a medium-severity flaw[1], while Strix lists it at 7.3/10 (HIGH severity)[3].Rescana reports that, according to Ahsay, the v10.3.4.0 release "did not fully address"[4] the two CVEs. Huntress says Ahsay released a hotfix on October 12[1] and advises v10 users to apply the AhsayCBS 10.3.4.45 hotfix[1]. Huntress says it has independently verified that the 10.3.4.45 hotfix mitigates the initial entry point[1], while Rescana says it found no independent confirmation that v10.3.4.45 fully fixes the flaws[4].SecurityWeek quotes Huntress as recommending that "access should be limited to trusted IP addresses only or require VPN."[5]

Listen to the songCritical CVEs (1 of 3) — October 15, 2026

Sources

  1. [1]Threat Actors Exploit Critical AhsayCBS Flaws to Drop Webshells and XMRig Cryptominer | Huntress
  2. [2]CVE-2026-105133 in AhsayCBS
  3. [3]CVE-2026-105133: AhsayCBS Authentication Bypass (CVSS 7.3)
  4. [4]AhsayCBS Backup Console Under Active Exploitation: CVE-2026-105133/105134 Chain Leads From Auth Bypass to RCE, and 10.3.4.0 Does Not Close It – Rescana
  5. [5]Unpatched AhsayCBS Vulnerabilities Exploited in the Wild - SecurityWeek

Every sentence here reports what a named outlet said, with a link to it. Compiled by 93 from the reporting below.

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