Security readout for executives and security teams
Plain-English summary
A remote, unauthenticated attacker could take full control of an affected QuantaStor system by reaching improperly protected Kapacitor functionality. Successful exploitation runs code as root, threatening stored data, system integrity, and availability. The supplied record identifies one affected build; broader version exposure is unknown.
Executive priority
Treat as an immediate remediation priority for any confirmed affected and network-reachable system. Root-level compromise could expose or alter storage data and disrupt operations. Systems reachable from the internet or broad internal networks should receive the fastest containment and vendor-guided remediation.
Technical view
CVE-2026-18265 is a CWE-306 missing-authentication flaw in QuantaStor’s Kapacitor configuration. It is network-reachable, requires no privileges or user interaction, and can execute arbitrary code as root. CVSS 3.0 rates it 9.8. The listed affected version is 6.7.3.010+9c965a6414; other versions are not established by the supplied evidence.
Likely exposure
Highest risk applies where the identified QuantaStor build exposes the affected Kapacitor functionality to untrusted networks. Internet accessibility would materially increase urgency. The supplied sources do not establish whether Kapacitor is exposed by default or whether additional QuantaStor versions are affected.
Exploitation context
Exploitation requires network access but no authentication, privileges, or victim interaction. Successful exploitation provides root-context code execution. The CVE is not listed as KEV in the supplied bundle, and no supplied source confirms active exploitation; this does not establish that exploitation is absent.
Researcher notes
ZDI tracks this issue as ZDI-CAN-30036 and ZDI-26-480. The supplied evidence identifies the flaw location and impact but does not provide a fixed version, vendor mitigation, default exposure details, or confirmed exploitation telemetry. Avoid extrapolating the affected range beyond the explicitly listed build.
Mitigation direction
- Identify systems running QuantaStor 6.7.3.010+9c965a6414 and prioritize them immediately.
- Check OSNEXUS guidance for confirmed fixed versions or vendor-approved mitigations.
- Restrict affected Kapacitor functionality to trusted management networks until vendor remediation is applied.
- Remove unnecessary internet exposure and enforce network segmentation around QuantaStor management services.
- Monitor affected systems for unusual privileged activity or unexpected configuration changes.
Validation and detection
- Confirm deployed QuantaStor versions through authoritative asset and configuration records.
- Determine whether Kapacitor functionality is reachable from internet or other untrusted network segments.
- Verify access controls prevent unauthenticated connections to the affected functionality.
- After remediation, confirm the vendor-recommended version or mitigation is consistently deployed.
- Review logs and integrity signals for suspicious root-level activity on exposed systems.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-18265 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9zdiVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ZDI-26-480CVE reference, zdi · x_research-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.