EUVD-2026-63483
GHSA-8p2m-xq5p-3g6w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Network-reachable, unauthenticated Kapacitor interface (AV:N/AC:L/PR:N/UI:N) yields code execution as root with full C/I/A loss; scope unchanged as impact stays within the vulnerable host.
Primary rating from Vendor (zdi).
CVSS VectorVendor: zdi
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Unauthenticated remote code execution in OSNEXUS QuantaStor lets network-based attackers run arbitrary code as root by abusing an insecurely configured Kapacitor service that exposes functionality with no authentication check. ZDI (ZDI-26-480, ZDI-CAN-30036) rates it CVSS 9.8; no public exploit identified at time of analysis, and it is not currently listed in CISA KEV.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the QuantaStor Kapacitor interface, which is exposed without authentication per the ZDI advisory; the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms no privileges and no user interaction are needed against affected installations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All available severity signals align. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch version is identified in the available data, so the exact fixed build must be obtained directly from OSNEXUS - consult the ZDI advisory at https://www.zerodayinitiative.com/advisories/ZDI-26-480/ and the vendor for the patched QuantaStor release, then upgrade as the primary fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: immediately isolate any internet-exposed OSNEXUS QuantaStor instances from untrusted networks; review access logs and administrative activity for evidence of unauthorized access; contact OSNEXUS support for interim guidance and patch timeline. …
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External POC / Exploit Code
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