Is CVE-2021-35973 in the CISA KEV catalog?

No. CVE-2021-35973 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-35973?

CVE-2021-35973 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-35973?

CVE-2021-35973 has an EPSS score of 3.06% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-35973?

Upgrade wac104 firmware to 1.0.4.15 or later.

CVE & CISA-KEV Catalog

CVE-2021-35973

CRITICALEPSS 86th pctl

9.8

CVSS v3

NVD

Description

NETGEAR WAC104 devices before 1.0.4.15 are affected by an authentication bypass vulnerability in /usr/sbin/mini_httpd, allowing an unauthenticated attacker to invoke any action by adding the &currentsetting.htm substring to the HTTP query, a related issue to CVE-2020-27866. This directly allows the attacker to change the web UI password, and eventually to enable debug mode (telnetd) and gain a shell on the device as the admin limited-user account (however, escalation to root is simple because of weak permissions on the /etc/ directory).

CWE-697

How to fix

Remediation Available

wac104 firmwareNVD

Affected:< 1.0.4.15Fixed in:1.0.4.15CVE-2021-35973derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

3.06%probability of exploitation in 30 days

86thpercentile

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

References

Exploit1

gynvael.coldwind.pl

Vendor Advisory1

kb.netgear.com

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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.