HOMEVULNERABILITIESCVE-2018-21170
HIGH

CVE-2018-21170

CWE-787Published: April 27, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects EX2700 before 1.0.1.28, R7800 before 1.0.2.40, WN2000RPTv3 before 1.0.1.20, WN3000RPv3 before 1.0.2.50, and WN3100RPv2 before 1.0.0.56.

NVD Source

Technical Analysis

CVE-2018-21170 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 8.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

netgear10 product(s)
r7800 firmwarer7800ex2700 firmwareex2700wn2000rpt firmwarewn2000rptwn3000rp firmwarewn3000rpwn3100rp firmwarewn3100rp
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
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/000055188/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Extenders-PSV-2017-2638
ADVISORYhttps://kb.netgear.com/000055188/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Extenders-PSV-2017-2638

All References (2)

→
https://kb.netgear.com/000055188/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Extenders-PSV-2017-2638Vendor Advisory
→
https://kb.netgear.com/000055188/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Extenders-PSV-2017-2638Vendor Advisory

Quick Facts

CVE IDCVE-2018-21170
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedApr 27, 2020

Related CVEs (CWE-787)

CVE-2004-0978
10.0
CVE-2015-5105
10.0
CVE-2004-0574
10.0
CVE-2009-2466
10.0
CVE-2011-1807
10.0
CVE-2015-5096
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-21170 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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