Security readout for executives and security teams
Plain-English summary
Dell Repository Manager before version 3.4.8 has a local privilege escalation flaw. An attacker who already has low-privileged local access, and some user interaction, may be able to run code with higher privileges. This is most urgent on administrator workstations or servers where DRM is installed.
Executive priority
Treat as a high-priority administrative tooling update. It is not described as remotely exploitable, but it could let an existing low-privileged local attacker gain greater control on systems managing Dell repositories.
Technical view
CVE-2026-21420 is a CWE-427 uncontrolled search path element issue in Dell Repository Manager versions prior to 3.4.8. CVSS 3.1 is 7.3 high: local attack vector, low complexity, low privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to systems running Dell Repository Manager before 3.4.8. The attacker must already have local low-privileged access and requires user interaction, reducing internet-scale risk but raising concern for shared admin systems and post-compromise escalation.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV in the bundle. This is most relevant as a privilege escalation path after initial access, not as a remote entry point.
Researcher notes
Key constraints are local access, low privileges, and required user interaction. The weakness class is uncontrolled search path element, typically involving unsafe loading or path resolution behavior. Public source detail is limited; rely on Dell’s advisory for precise product and remediation details.
Mitigation direction
- Upgrade Dell Repository Manager to version 3.4.8 or later.
- Review Dell advisory DSA-2026-059 for official update guidance.
- Prioritize systems used for server, firmware, or repository administration.
- Restrict local access to systems running Dell Repository Manager.
Validation and detection
- Inventory endpoints and servers for Dell Repository Manager installations.
- Confirm installed DRM versions are 3.4.8 or later.
- Check whether DRM is present on privileged administrator workstations.
- Track remediation status against Dell advisory DSA-2026-059.
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-427: 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 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-2026-21420 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
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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.
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:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H1.35.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/en-us/000430183/dsa-2026-059-security-update-for-dell-repository-manager-vulnerabilityCVE reference · vendor-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.
Uncontrolled Search Path Element
Uncontrolled Search Path Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.