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CVE-2020-27866

HIGH
Published 2021-02-11T23:35:39
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CVSS Score

V3.0
8.8
/10
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.855
probability
of exploitation in the wild

There is a 85.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.993
Higher than 99.3% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 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 incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Available Exploits

NETGEAR - Authentication Bypass

NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers are vulnerable to authentication bypass vulnerabilities which could allow network-adjacent attackers to bypass authentication on affected installations.

ID: CVE-2020-27866
Author: gy741 High

References:

SonarQube - Authentication Bypass

SonarQube 8.4.2.36762 allows remote attackers to discover cleartext SMTP, SVN, and GitLab credentials via the api/settings/values URI.

ID: CVE-2020-27986
Author: pikpikcu High

References:

Related News

No news articles found for this CVE.

Affected Products

NETGEAR

Multiple Routers

Affected Versions:

firmware version 1.2.0.62_1.0.1

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-mj6p-ghhj-r3q4

Advisory Details

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 firmware version 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 incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

CVSS Scoring

CVSS Score

7.5

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-27866
WEB https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
WEB https://www.zerodayinitiative.com/advisories/ZDI-20-1451

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: May 24, 2022

References

https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
Published: 2021-02-11T23:35:39
Last Modified: 2024-08-04T16:25:43.625Z
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