Security readout for executives and security teams
Plain-English summary
An authenticated delegated OpenWrt LuCI user may be able to turn limited Samba management access into root-level command execution. This is serious for routers and embedded gateways because compromise can expose traffic, credentials, and internal networks. The source bundle does not name affected versions or a fixed release.
Executive priority
Treat this as a high-priority infrastructure issue where OpenWrt devices are centrally managed or delegated access exists. Prioritize internet-adjacent and branch-network devices first, then reduce LuCI exposure and delegated permissions while awaiting or applying vendor guidance.
Technical view
The issue is an improper privilege assignment in OpenWrt LuCI’s luci-app-samba4 ACLs. A read ACL grants file.exec on /usr/sbin/smbd, letting authenticated delegated users run smbd with caller-controlled arguments. Sources describe abuse of Samba global options leading to command execution in a root smbd process.
Likely exposure
Exposure is likely limited to OpenWrt systems running LuCI with luci-app-samba4 installed and delegated authenticated users configured. Risk is higher where LuCI management is reachable from untrusted networks or shared administrative environments. The bundle does not provide version ranges.
Exploitation context
The CVSS vector indicates network access, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The source bundle and KEV flag do not support claiming active exploitation. Exploitation requires authenticated delegated access, not unauthenticated internet-only access.
Researcher notes
The public bundle identifies CWE-269 and CVSS 8.8, but omits exact affected versions, fixed versions, and observed exploitation evidence. Analysis should focus on ACL exposure, package presence, and management-plane reachability without assuming all OpenWrt installations are affected.
Mitigation direction
- Check the OpenWrt LuCI advisory for fixed packages or vendor-recommended configuration changes.
- Update luci-app-samba4 and related LuCI packages when vendor fixes are available.
- Remove luci-app-samba4 where Samba management through LuCI is unnecessary.
- Restrict LuCI access to trusted management networks or VPN users only.
- Review and minimize delegated LuCI permissions for non-admin users.
Validation and detection
- Inventory OpenWrt devices running LuCI and luci-app-samba4.
- Identify delegated LuCI users and review their Samba-related ACL grants.
- Check whether any ACL permits file.exec on /usr/sbin/smbd.
- Compare installed packages against the OpenWrt advisory when version guidance is available.
- Review management access logs for unexpected delegated-user activity.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-59260 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
2 official scoresWe 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:H/I:H/A:H2.85.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/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
- GitHub Security Advisory (GHSA-vx64-mmp7-h36c)CVE reference, VulnCheck · vendor-advisory
- VulnCheck Advisory: OpenWrt luci-app-samba4 read ACL remote code execution via smbdCVE reference, VulnCheck · third-party-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.
Improper Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.