LiveActive security incident?Get immediate response
CVE Record

CVE-2019-20763: 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
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2019-20763 affects NETGEAR R7800 routers running firmware before 1.0.2.52. An already authenticated user near the device network could trigger a stack-based buffer overflow with high confidentiality, integrity, and availability impact. This is not listed as known exploited in the provided sources.

Executive priority

Treat this as a medium-priority network device remediation. It requires authentication and adjacent access, but successful exploitation could seriously affect router confidentiality, integrity, and availability.

Technical view

The CVE describes a post-authentication stack-based buffer overflow in NETGEAR R7800 firmware before 1.0.2.52. CVSS 3.0 is 6.8 with adjacent-network attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high C/I/A impact.

Likely exposure

Exposure is limited to environments that still operate NETGEAR R7800 devices below firmware 1.0.2.52. Risk is higher where authenticated router access is broadly available on local or adjacent networks.

Exploitation context

The provided sources do not show active exploitation, KEV listing, public exploit use, or exploit maturity. The main constraint is that the attacker must already be authenticated and adjacent to the vulnerable device network.

Researcher notes

Public bundle details are sparse: no CWE entry, no CPE data, and no exploit evidence. The strongest source-grounded claims are affected product, version boundary, post-authentication stack overflow class, CVSS vector, and lack of KEV status.

Mitigation direction

  • Inventory NETGEAR R7800 devices and record current firmware versions.
  • Upgrade affected R7800 devices to firmware 1.0.2.52 or later, following NETGEAR guidance.
  • Restrict router administrative access to trusted users and trusted network segments.
  • Review NETGEAR advisory details before applying operational changes.
  • Replace unsupported or unpatchable devices where firmware cannot be updated.

Validation and detection

  • Confirm whether any R7800 device reports firmware earlier than 1.0.2.52.
  • Verify patched devices show firmware 1.0.2.52 or later after update.
  • Review access controls for authenticated router management paths.
  • Check logs for unexpected authenticated configuration or management activity.
  • Document remaining vulnerable devices and compensating controls.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2019-20763 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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-2019-20763Attack 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

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.