Security readout for executives and security teams
Plain-English summary
This is a NETGEAR router and WiFi system flaw where an already authenticated user on an adjacent network could trigger a stack overflow. The main business impact is device availability, not confirmed data theft. It matters most for organizations still running affected firmware on listed NETGEAR models.
Executive priority
Treat as a moderate-priority network appliance maintenance issue. Patch affected devices during the next approved maintenance window, sooner for offices where router downtime would disrupt business operations.
Technical view
CVE-2021-38524 is a post-authentication stack-based buffer overflow affecting specified NETGEAR MK, MR, MS, RAX, and RBK/RBR/RBS devices before listed firmware versions. CVSS 3.1 is 4.5 with adjacent attack vector, high privileges required, no user interaction, and high availability impact.
Likely exposure
Exposure is likely limited to environments using the named NETGEAR models with outdated firmware and reachable administrative access from adjacent networks. The source bundle does not identify broader product lines or cloud services as affected.
Exploitation context
The bundle does not show CISA KEV listing or other cited evidence of active exploitation. Exploitation requires an authenticated user with high privileges and adjacent network access, which lowers likelihood but does not remove operational risk.
Researcher notes
The CVSS vector indicates adjacent-network reachability, low attack complexity, high privileges required, unchanged scope, and availability-only impact. The source bundle names affected firmware thresholds but does not provide exploit details, root cause beyond stack overflow, or independent exploitation evidence.
Mitigation direction
- Upgrade affected devices to firmware versions at or above the fixed versions named by NETGEAR.
- Prioritize devices providing office, guest, or remote-site network connectivity.
- Review who has administrative access to affected NETGEAR management interfaces.
- Check NETGEAR advisory guidance for model-specific firmware and support details.
Validation and detection
- Inventory NETGEAR MK62, MR60, MS60, RAX, RBK752, RBR750, and RBS750 devices.
- Compare each device firmware version against the affected version thresholds in the CVE description.
- Confirm whether administrative access is limited to trusted authorized users.
- Document patched, unsupported, or still-vulnerable devices for remediation tracking.
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.
CVE-2021-38524 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
- Medium
- CVSS
- 4.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:A/A:H/C:N/I:N/PR:H/S:U/UI:N
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/AC:L/AV:A/A:H/C:N/I:N/PR:H/S:U/UI:N0.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.5MediumVector: CVSS:3.1/AC:L/AV:A/A:H/C:N/I:N/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000063779/Security-Advisory-for-Post-Authentication-Stack-Overflow-on-Some-Routers-and-WiFi-Systems-PSV-2020-0225CVE reference · x_refsource_MISC
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.