Security readout for executives and security teams
Plain-English summary
This vulnerability is in router firmware code used by Realtek’s rtl819x Jungle SDK and a listed LevelOne WBR-6013 firmware. An authenticated attacker with high privileges could trigger a memory corruption flaw through HTTP requests and potentially run code on the device.
Executive priority
Treat this as a high-priority edge-device risk where affected routers are deployed. Urgency is highest for devices with exposed management interfaces or weak administrative controls. No public source in the bundle confirms active exploitation.
Technical view
CVE-2023-49867 is a stack-based buffer overflow in the boa formWsc functionality of Realtek rtl819x Jungle SDK v3.4.11. The CVSS 3.1 score is 7.2, with network reachability, low attack complexity, no user interaction, and high privileges required.
Likely exposure
Exposure is most likely in LevelOne WBR-6013 devices running firmware RER4_A_v3411b_2T2R_LEV_09_170623, and products directly built from Realtek rtl819x Jungle SDK v3.4.11. The source bundle does not identify broader OEM impact.
Exploitation context
The CVE record says specially crafted HTTP requests can lead to remote code execution. KEV status is false, and the provided sources do not show confirmed active exploitation in the wild.
Researcher notes
The important constraints are PR:H and HTTP reachability. Validate exposure through asset inventory and configuration review, not exploit reproduction. Evidence is limited to the CVE metadata and Talos report references supplied in the bundle.
Mitigation direction
- Inventory LevelOne WBR-6013 and Realtek rtl819x SDK-derived devices.
- Check LevelOne, Realtek, and Talos guidance for supported firmware updates.
- Remove administrative HTTP interfaces from internet exposure.
- Limit management access to trusted networks or VPN paths.
- Review and harden administrator accounts because exploitation requires high privileges.
Validation and detection
- Confirm device model and firmware version against the affected list.
- Identify whether embedded firmware uses Realtek rtl819x Jungle SDK v3.4.11.
- Verify management HTTP access is blocked from untrusted networks.
- Review logs for unusual authenticated administrative HTTP activity.
- Track vendor advisories for patch or mitigation status.
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
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CWE-121: Exact CWE lookup
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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-2023-49867 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.