Is CVE-2021-42540 in the CISA KEV catalog?

No. CVE-2021-42540 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42540?

CVE-2021-42540 has a CVSS v3 base score of 8.0 (HIGH).

What is the EPSS score for CVE-2021-42540?

CVE-2021-42540 has an EPSS score of 0.97% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42540?

Upgrade wireless 1410 gateway firmware to 4.7.94 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-42540

HIGH

8.0

CVSS v3

NVD

Description

The affected product is vulnerable to a unsanitized extract folder for system configuration. A low-privileged user can leverage this logic to overwrite the settings and other key functionality.

CWE-123

How to fix

Remediation Available

wireless 1410 gateway firmwareNVD

Affected:< 4.7.94Fixed in:4.7.94CVE-2021-42540derived from NVD

wireless 1410d gateway firmwareNVD

Affected:< 4.7.94Fixed in:4.7.94CVE-2021-42540derived from NVD

wireless 1420 gateway firmwareNVD

Affected:< 4.7.94Fixed in:4.7.94CVE-2021-42540derived 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 RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.97%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Patch1

us-cert.cisa.gov

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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.