Security readout for executives and security teams
Plain-English summary
This flaw affects specific NETGEAR switches and can be triggered before login by an attacker on an adjacent network. The main business risk is disruption: the CVSS vector rates availability impact as high, with lower confidentiality and integrity impact.
Executive priority
Treat as high priority for environments with these NETGEAR switches. Schedule firmware updates promptly, prioritizing switches on shared, exposed, or weakly segmented management networks where an adjacent unauthenticated attacker is more plausible.
Technical view
CVE-2019-20697 is a pre-authentication stack-based buffer overflow in listed NETGEAR switch models. CVSS 3.0 is 8.8 with adjacent-network attack vector, low complexity, no privileges, no user interaction, changed scope, and high availability impact.
Likely exposure
Exposure is limited to organizations running affected NETGEAR GS728TPPv2, GS728TPv2, GS750E, GS752TPP, or GS752TPv2 firmware below the fixed versions listed in the CVE description.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The issue is still serious because it is unauthenticated and pre-authentication, but the CVSS vector indicates adjacent-network reach, not general internet reach.
Researcher notes
The provided data identifies affected models and fixed version thresholds but gives no CWE entry, exploit details, or active exploitation evidence. Avoid assuming remote internet exploitation unless local exposure data shows management access crosses network boundaries.
Mitigation direction
- Inventory NETGEAR switch models and firmware versions.
- Upgrade GS728TPPv2, GS728TPv2, GS752TPP, and GS752TPv2 to 6.0.0.48 or later.
- Upgrade GS750E to 1.0.1.4 or later.
- Restrict switch management access to trusted administrative networks.
- Check the NETGEAR advisory for model-specific guidance.
Validation and detection
- Confirm each affected model appears in network asset inventory.
- Verify installed firmware is at or above the listed fixed version.
- Confirm management interfaces are reachable only from trusted administration segments.
- Review change records for completed switch firmware updates.
- Monitor affected switches for unexpected instability until remediated.
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-2019-20697 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
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:L/I:L/PR:N/S:C/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:A/A:H/C:L/I:L/PR:N/S:C/UI:N2.85.3Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AC:L/AV:A/A:H/C:L/I:L/PR:N/S:C/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061232/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Switches-PSV-2019-0066CVE 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.