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CVE Record

CVE-2019-20764: NETGEAR R7800 devices before 1.0.2.52 are affected by a stack-based buffer overflow by an authenticated user.

NETGEAR R7800 devices before 1.0.2.52 are affected by a stack-based buffer overflow by an authenticated user.

MediumCVSS 6.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2019-20764 affects NETGEAR R7800 routers running firmware before 1.0.2.52. An already authenticated user could trigger a stack-based overflow with severe confidentiality, integrity, and availability impact. The sources do not show public active exploitation or KEV listing.

Executive priority

Treat this as a moderate-priority infrastructure hygiene issue. It is not flagged as actively exploited in the provided sources, but vulnerable routers can become high-impact control points if an attacker obtains admin access.

Technical view

The CVE describes a post-authentication stack-based buffer overflow in NETGEAR R7800 devices before firmware 1.0.2.52. CVSS v3.0 is 6.8, with adjacent-network access, low attack complexity, high privileges required, no user interaction, and high C/I/A impact.

Likely exposure

Exposure is limited to NETGEAR R7800 devices on firmware earlier than 1.0.2.52. Risk is higher where router admin access is broadly reachable, credentials are shared, or legacy network equipment is unmanaged.

Exploitation context

The provided sources do not state active exploitation, public exploit availability, or KEV inclusion. Abuse requires authentication with high privileges and adjacent-network access according to the CVSS vector, but impact can be severe if exploited.

Researcher notes

Evidence is narrow: the bundle names R7800 firmware before 1.0.2.52 and a post-authentication stack overflow, but provides no CWE entry, exploit detail, affected CPEs, or operational indicators. Validate only through version and configuration review.

Mitigation direction

  • Update NETGEAR R7800 firmware to version 1.0.2.52 or later.
  • Review the NETGEAR advisory for vendor-specific instructions.
  • Restrict router administration to trusted management networks.
  • Rotate shared or weak router administrator credentials.
  • Remove unsupported or unmanaged R7800 devices from production networks.

Validation and detection

  • Inventory NETGEAR R7800 devices across office and remote sites.
  • Confirm each device firmware is 1.0.2.52 or later.
  • Verify administrative interfaces are not reachable from untrusted networks.
  • Review router admin account access and recent configuration changes.
  • Document exceptions and compensating controls for devices not yet updated.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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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CVE-2019-20764 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.8CVSS 3.0MediumCVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N0.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.8Medium
CVSS 3.0 vector shape for CVE-2019-20764Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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