HOMEVULNERABILITIESCVE-2020-27872
HIGH

CVE-2020-27872

CWE-642Published: February 4, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7450 1.2.0.62_1.0.1 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from improper state tracking in the password recovery process. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11365.

NVD Source

Technical Analysis

CVE-2020-27872 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.

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

netgear38 product(s)
ac2100 firmwareac2100ac2400 firmwareac2400ac2600 firmwareac2600r6700 firmwarer6700r6800 firmwarer6800r6900 firmwarer6900+26
Source: NVD CPE · 38 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/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-071/
ADVISORYhttps://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-071/

All References (4)

→
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-RoutersVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-071/Third Party Advisory · VDB Entry
→
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-RoutersVendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-071/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2020-27872
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-642
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 4, 2021

Related CVEs (CWE-642)

CVE-2018-15382
8.6
CVE-2024-8754
8.1
CVE-2019-9496
7.5
CVE-2025-49090
7.1
CVE-2020-26186
6.8
CVE-2022-22154
6.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27872 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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