CVE-2026-105133: Ahsay AhsayCBS Improper Authentication Vulnerability

Patch now

HIGH 7.3EXPLOITEDREMOTEUPGRADE

CVE-2026-105133 is a high-severity flaw (CVSS 7.3) affecting cloud backup suite, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
EPSS top 7%: very likely to be exploited
Exploited in the wild (CISA KEV)
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	Yes, fix due 2026-10-17
Weakness	CWE-287
Published	2026-10-04
Last modified	2026-10-15

Publisher (CNA): VulDB · Vendor: ahsay

Am I affected?

Timeline

2026-10-04 07:16 UTCPublished CVE record published
2026-10-14Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-10-15 13:47 UTCUpdated Record last modified
2026-10-17Deadline CISA due date for US federal agencies to patch

ahsay cloud backup suite UPGRADE

Affected: < 10.3.4

Fixed in: 10.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cloud-backup-suite || rpm -q cloud-backup-suite || cloud-backup-suite --version

2. UPGRADE to 10.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cloud-backup-suite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cloud-backup-suite

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source

sudo dnf upgrade --advisory=FEDORA-2026-0602a84203

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: horizon3ai/AhsayCBS-Auth-Bypass-RCE (4 stars)
Nuclei scan template: AhsayCBS - JSON API Authentication Bypass

Advisories and coverage

Research and news

Huntress: Threat Actors Exploit Critical AhsayCBS Flaws to Drop Webshells and XMRig Cryptominer 2026-10-08

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Related CVEs

CVE-2026-105134 CRITICAL 10.0 EXPLOITED UPGRADE Ahsay AhsayCBS Command Injection Vulnerability

References

← Back to latest CVEs