Security readout for executives and security teams
Plain-English summary
Some NETGEAR smart switches have a pre-authentication buffer overflow. An attacker who can reach the affected service over the network may disrupt device availability without logging in. The cited CVSS data shows high availability impact, not confidentiality or integrity impact.
Executive priority
Prioritize remediation for affected switches in production, remote sites, or shared network segments. The business risk is service disruption rather than data theft based on the cited CVSS vector.
Technical view
CVE-2019-20699 affects listed NETGEAR switch firmware versions before specified fixed releases. It is network reachable, low complexity, requires no privileges or user interaction, and is scored CVSS 3.0 7.5 with availability impact only. The sources do not identify CWE details or code execution impact.
Likely exposure
Exposure is most likely where affected NETGEAR switch management or vulnerable network services are reachable from untrusted networks. Impact is operational: loss of switch availability can disrupt local network connectivity and managed switching functions.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Treat this as a credible unauthenticated network denial-of-service risk, but do not assume exploitation in the wild from these sources alone.
Researcher notes
The public bundle identifies affected models and fixed version thresholds but provides limited technical root-cause detail. CVSS indicates AV:N/PR:N/UI:N with A:H only; avoid inferring confidentiality, integrity, or remote code execution impact without additional vendor evidence.
Mitigation direction
- Check NETGEAR advisory PSV-2018-0538 for model-specific firmware guidance.
- Upgrade GS105Ev2, GS105PE, and GSS108E to 1.6.0.4 or later.
- Upgrade GS408EPP and GSS108EPP to 1.0.0.15 or later.
- Upgrade GS808E to 1.7.0.7 or later.
- Upgrade GS908E to 1.7.0.3 or later.
- Restrict switch management access to trusted administrative networks.
Validation and detection
- Inventory NETGEAR switch models and firmware versions.
- Compare installed firmware against the affected version thresholds.
- Confirm management interfaces are not exposed to untrusted networks.
- Review monitoring for unexplained switch crashes, resets, or availability loss.
- Retain evidence of firmware upgrade completion for asset records.
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-2019-20699 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
- 7.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/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:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061230/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Switches-PSV-2018-0538CVE reference · x_refsource_CONFIRM
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.