Is CVE-2021-23406 in the CISA KEV catalog?

No. CVE-2021-23406 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23406?

CVE-2021-23406 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2021-23406?

CVE-2021-23406 has an EPSS score of 2.86% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23406?

Upgrade pac-resolver to 5.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-23406

HIGHEPSS 85th pctl

8.1

CVSS v3

NVD

Description

This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. **NOTE:** The fix for this vulnerability is applied in the node-degenerator library, a dependency written by the same maintainer.

How to fix

Remediation Available

pac-resolverNVD

Affected:< 5.0.0Fixed in:5.0.0CVE-2021-23406derived 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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.86%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch5

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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.