Is CVE-2021-21706 in the CISA KEV catalog?

No. CVE-2021-21706 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-21706?

CVE-2021-21706 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-21706?

CVE-2021-21706 has an EPSS score of 1.34% (68th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-21706?

Upgrade php to 8.0.11 or later.

CVE & CISA-KEV Catalog

CVE-2021-21706

MEDIUM

5.3

CVSS v3

NVD

Description

In PHP versions 7.3.x below 7.3.31, 7.4.x below 7.4.24 and 8.0.x below 8.0.11, in Microsoft Windows environment, ZipArchive::extractTo may be tricked into writing a file outside target directory when extracting a ZIP file, thus potentially causing files to be created or overwritten, subject to OS permissions.

CWE-24 CWE-22Path Traversal

How to fix

Remediation Available

phpNVD

Affected:>= 8.0.0, < 8.0.11Fixed in:8.0.11CVE-2021-21706derived 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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.34%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Patch1

bugs.php.net

Third-Party Advisory1

security.netapp.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.