HOME VULNERABILITIESCVE-2021-38517

HIGH

CVE-2021-38517

CWE-125Published: August 11, 2021· Updated: Jun 17, 2026

7.2

CVSS v3.1

Official Description

Certain NETGEAR devices are affected by out-of-bounds reads and writes. This affects R6400 before 1.0.1.70, RAX75 before 1.0.4.120, RAX80 before 1.0.4.120, and XR300 before 1.0.3.50.

Technical Analysis

CVE-2021-38517 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.High

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear8 product(s)

r6400 firmwarer6400rax75 firmwarerax75rax80 firmwarerax80xr300 firmwarexr300

Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://kb.netgear.com/000063772/Security-Advisory-for-Out-of-Bounds-Read-and-Write-on-Some-Routers-PSV-2019-0187

ADVISORYhttps://kb.netgear.com/000063772/Security-Advisory-for-Out-of-Bounds-Read-and-Write-on-Some-Routers-PSV-2019-0187

All References (2)

→

https://kb.netgear.com/000063772/Security-Advisory-for-Out-of-Bounds-Read-and-Write-on-Some-Routers-PSV-2019-0187Vendor Advisory

→

https://kb.netgear.com/000063772/Security-Advisory-for-Out-of-Bounds-Read-and-Write-on-Some-Routers-PSV-2019-0187Vendor Advisory

Quick Facts

CVE IDCVE-2021-38517

CVSS Score7.2 / 10

SeverityHIGH

WeaknessCWE-125

CISA KEVNo

Affected1 vendor(s)

PublishedAug 11, 2021

Related CVEs (CWE-125)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2021-38517 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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