Vulnerability · Published Aug 20, 2026 · Assigned by zdi

CVE-2026-18265OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability

Critical 9.8

In plain English

A critical-severity missing authentication in QuantaStor from OSNEXUS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).

Severity (CVSS 3.0)9.8Critical

Exploit odds (30 days)1.0%top 35.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OSNEXUS QuantaStor. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of Kapacitor. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-30036.

Affected products (as reported)

Vendor	Product	Versions
OSNEXUS	QuantaStor	6.7.3.010+9c965a6414

Weakness: CWE-306 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

ZDI-26-480 x_research-advisory