Security readout for executives and security teams
Plain-English summary
This vulnerability affects Realtek rtl819x Jungle SDK code used in some router firmware, including the listed LevelOne WBR-6013 firmware. A crafted sequence of network requests can trigger a stack buffer overflow and may allow remote code execution. Public sources do not name a patch or active exploitation.
Executive priority
Treat this as a high-priority edge-device risk if affected routers are deployed, especially where management services are reachable beyond trusted admin networks. Prioritize inventory, exposure reduction, and vendor remediation confirmation.
Technical view
CVE-2023-50240 is a CWE-121 stack-based buffer overflow in boa set_RadvdInterfaceParam for Realtek rtl819x Jungle SDK v3.4.11. The issue is tied to the AdvDefaultPreference request parameter. CVSS 3.1 is 7.2, with network attack vector, low complexity, high privileges required, and high CIA impact.
Likely exposure
Exposure is most likely in devices or firmware derived from Realtek rtl819x Jungle SDK v3.4.11, specifically the LevelOne WBR-6013 firmware version named in the sources. Internet-exposed or broadly reachable management interfaces would increase business risk.
Exploitation context
The provided sources say a specially crafted series of network requests can lead to remote code execution. CVSS marks privileges required as high. CISA KEV status is false in the bundle, and no cited source confirms active exploitation.
Researcher notes
Evidence identifies the vulnerable function, parameter, product lineage, affected firmware, CWE, and CVSS vector. The bundle does not provide a named fixed version, vendor patch, or verified exploitation in the wild, so remediation claims should remain vendor-guidance based.
Mitigation direction
- Inventory routers and firmware for the listed Realtek SDK or LevelOne WBR-6013 build.
- Check Realtek and device-vendor guidance for firmware updates or replacement direction.
- Restrict management interface access to trusted administrative networks only.
- Remove any internet exposure of affected web administration services.
- Replace affected unsupported devices if vendor remediation is unavailable.
Validation and detection
- Confirm device model, firmware build, and SDK lineage against the affected list.
- Verify administrative web interfaces are not reachable from untrusted networks.
- Review access controls requiring high-privilege authentication for management functions.
- Check vulnerability management data for CVE-2023-50240 findings.
- Document vendor patch status or unsupported-device decisions.
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-121: 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-2023-50240 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
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.
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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.