Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote attacker crash and reboot certain NETGEAR ProSAFE Plus switches. For a business, the main risk is network disruption, not confirmed data theft or takeover. The public sources name JGS516PE and GS116Ev2 devices running firmware v2.6.0.43.
Executive priority
Treat this as an availability risk for network infrastructure. Prioritize exposed or business-critical switches first, especially where disruption would affect operations, facilities, or customer-facing connectivity.
Technical view
CVE-2020-35224 is a buffer overflow in the NSDP protocol authentication method on NETGEAR JGS516PE/GS116Ev2 v2.6.0.43. The stated impact is forced device reboot by a remote unauthenticated attacker. The provided sources do not include CVSS, CWE, exploit maturity, or a named fixed firmware version.
Likely exposure
Exposure exists where affected switches run v2.6.0.43 and the NSDP protocol is reachable by untrusted users or network segments. The sources do not establish internet exposure or broader firmware impact.
Exploitation context
The CVE record says attacks are remote and unauthenticated, with forced reboot as the impact. CISA KEV status is false in the bundle, and no cited source confirms active exploitation.
Researcher notes
Evidence is limited to the CVE description and NCC Group advisory reference. The source bundle names reboot via NSDP authentication buffer overflow but does not provide CVSS, CWE, patch details, or confirmed exploitation.
Mitigation direction
- Inventory NETGEAR JGS516PE and GS116Ev2 switches and firmware versions.
- Check NETGEAR and NCC Group guidance for fixed firmware or vendor mitigations.
- Restrict NSDP and management-plane reachability to trusted administration networks.
- Segment affected switches away from guest, user, and internet-facing networks.
- Monitor for repeated unexpected switch reboots or availability drops.
Validation and detection
- Confirm whether any switch is JGS516PE or GS116Ev2 running v2.6.0.43.
- Map which network segments can reach switch management or NSDP services.
- Review uptime, monitoring, and incident logs for unexplained reboots.
- Verify whether vendor firmware guidance has been applied.
- Document residual exposure if devices cannot be patched or isolated.
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-2020-35224 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://research.nccgroup.com/2021/03/08/technical-advisory-multiple-vulnerabilities-in-netgear-prosafe-plus-jgs516pe-gs116ev2-switches/CVE 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.