HOMEVULNERABILITIESCVE-2021-45636
HIGH

CVE-2021-45636

CWE-787Published: December 26, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

NETGEAR D7000 devices before 1.0.1.82 are affected by a stack-based buffer overflow by an unauthenticated attacker.

NVD Source

Technical Analysis

CVE-2021-45636 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

netgear2 product(s)
d7000 firmwared7000
Source: NVD CPE · 2 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

PATCHhttps://kb.netgear.com/000064447/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-D7000-PSV-2019-0182
PATCHhttps://kb.netgear.com/000064447/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-D7000-PSV-2019-0182

All References (2)

→
https://kb.netgear.com/000064447/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-D7000-PSV-2019-0182Patch · Vendor Advisory
→
https://kb.netgear.com/000064447/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-D7000-PSV-2019-0182Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2021-45636
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedDec 26, 2021

Related CVEs (CWE-787)

CVE-2004-0978
10.0
CVE-2018-6692
10.0
CVE-2026-4746
10.0
CVE-2002-2227
10.0
CVE-2012-3957
10.0
CVE-2015-0235
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45636 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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