CVE & CISA-KEV Catalog

CVE-2021-34865

HIGHEPSS 86th pctl
8.8
CVSS v3
NVD

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR 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 vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

CWE-287Improper AuthenticationCWE-697

How to fix

Remediation Available
ac2100 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
ac2400 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
ac2600 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
d7000v1 firmwareNVD
Affected:< 1.0.1.80Fixed in:1.0.1.80CVE-2021-34865derived from NVD
r6220 firmwareNVD
Affected:< 1.1.0.110Fixed in:1.1.0.110CVE-2021-34865derived from NVD
r6230 firmwareNVD
Affected:< 1.1.0.110Fixed in:1.1.0.110CVE-2021-34865derived from NVD
r6260 firmwareNVD
Affected:< 1.1.0.84Fixed in:1.1.0.84CVE-2021-34865derived from NVD
r6330 firmwareNVD
Affected:< 1.1.0.84Fixed in:1.1.0.84CVE-2021-34865derived from NVD
r6350 firmwareNVD
Affected:< 1.1.0.84Fixed in:1.1.0.84CVE-2021-34865derived from NVD
r6700v2 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r6800 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r6850 firmwareNVD
Affected:< 1.1.0.84Fixed in:1.1.0.84CVE-2021-34865derived from NVD
r6900v2 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r7200 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r7350 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r7400 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD
r7450 firmwareNVD
Affected:< 1.2.0.88Fixed in:1.2.0.88CVE-2021-34865derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent
Attack ComplexityLow
Privileges RequiredNone
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

Exploit Intelligence

3.08%probability of exploitation in 30 days
86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Vendor Advisory1
Third-Party Advisory1
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.