Security readout for executives and security teams
Plain-English summary
CVE-2026-28271 affects Kiteworks Core before version 9.2.0. A user with administrative/configuration access could bypass server-side request forgery protections using DNS rebinding and make Kiteworks reach internal services that should not be exposed. This is not reported as actively exploited in the provided sources.
Executive priority
Treat as a planned but prompt remediation item. The issue requires privileged access, reducing broad exposure, but it can affect internal service boundaries and integrity if an admin account is misused or compromised.
Technical view
The issue is an SSRF protection bypass in Kiteworks configuration functionality before 9.2.0. The CVE cites DNS rebinding as the bypass method. CVSS 3.1 is 6.5 with network attack vector, low complexity, low privileges, no user interaction, and high integrity impact. CWE mappings include CWE-350 and CWE-918.
Likely exposure
Organizations running Kiteworks Core versions earlier than 9.2.0 are potentially exposed, especially where administrator accounts or configuration privileges are broadly assigned or insufficiently monitored.
Exploitation context
The provided source describes exploitation by malicious administrators. It does not show public exploit code, unauthenticated exploitation, or confirmed exploitation in the wild. The CVE is not listed as KEV in the supplied data.
Researcher notes
Evidence is limited to the CVE record and Kiteworks advisory reference. The key exposure question is whether configuration functionality is accessible to accounts beyond tightly controlled administrators. Do not assume broader affected products or exploitability beyond the published description.
Mitigation direction
- Upgrade Kiteworks Core to version 9.2.0 or later.
- Review Kiteworks vendor advisory for any environment-specific guidance.
- Restrict Kiteworks administrative/configuration privileges to trusted personnel.
- Monitor administrative configuration changes and suspicious internal service access attempts.
Validation and detection
- Inventory Kiteworks Core deployments and confirm installed versions.
- Verify any instance below 9.2.0 is scheduled for upgrade.
- Review admin role assignments and remove unnecessary configuration access.
- Check security logs for unusual configuration activity by privileged users.
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-350: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-28271 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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.
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/kiteworks/security-advisories/security/advisories/GHSA-rmfx-6h9w-fq87CVE reference · x_refsource_CONFIRM
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.
Reliance on Reverse DNS Resolution for a Security-Critical Action
Reliance on Reverse DNS Resolution for a Security-Critical Action represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.