Security readout for executives and security teams
Plain-English summary
This vulnerability affects the web management software in a specific Realtek router SDK and a confirmed LevelOne WBR-6013 firmware. A privileged network attacker could trigger a memory corruption flaw that may allow remote code execution. Business urgency depends on whether affected management interfaces are reachable and whether these devices are still deployed.
Executive priority
Treat as high priority for inventory and exposure reduction, especially where affected router management interfaces are reachable beyond trusted administrators. Patch status is not established in the provided sources, so vendor confirmation is essential.
Technical view
CVE-2023-50239 is a stack-based buffer overflow in boa set_RadvdInterfaceParam within Realtek rtl819x Jungle SDK v3.4.11. The flaw is tied to the interfacename request parameter. The CVSS vector is network, low complexity, high privileges required, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Confirmed exposure includes LevelOne WBR-6013 firmware RER4_A_v3411b_2T2R_LEV_09_170623 and Realtek rtl819x Jungle SDK v3.4.11. Do not assume other Realtek-based devices are affected without vendor confirmation.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Talos states a specially crafted series of network requests can lead to remote code execution. CVSS indicates exploitation requires high privileges.
Researcher notes
The evidence identifies the vulnerable function, parameter, SDK version, and one affected LevelOne firmware. The bundle does not provide a patch version, exploitation-in-the-wild evidence, or broader OEM impact. Avoid broad product claims without vendor-backed confirmation.
Mitigation direction
- Identify deployed LevelOne WBR-6013 devices and firmware versions.
- Check Realtek and device-vendor guidance for fixed firmware or supported replacement paths.
- Restrict administrative interface reachability to trusted management networks.
- Remove internet exposure for affected router management services.
- Replace unsupported affected devices if no vendor fix is available.
Validation and detection
- Confirm device model and firmware match the affected LevelOne version.
- Confirm any product dependency on Realtek rtl819x Jungle SDK v3.4.11.
- Review exposure of router web management interfaces.
- Check vendor advisories before concluding remediation is complete.
- Track CISA KEV and vendor updates for exploitation or patch changes.
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-2023-50239 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.