CVE-2021-26623

HIGHNVD 7.89.8▲

7.8

A remote code execution vulnerability due to incomplete check for 'xheader_decode_path_record' function's parameter length value in the ark library. Remote attackers can induce exploit malicious code using this function.

CVSS v3: 7.8
EG Score: 9.8(medium)
EPSS: 80.3%
KEV: Not listed

Published

April 1, 2022

Last Modified

November 21, 2024

References (2)

vuln@krcerthttps://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66595
af854a3a-2127-422b-91ae-364da2661108https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66595

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2021-26623?

CVE-2021-26623 is a high vulnerability published on April 1, 2022. A remote code execution vulnerability due to incomplete check for 'xheaderdecodepath_record' function's parameter length value in the ark library. Remote attackers can induce exploit malicious code using this function.

When was CVE-2021-26623 disclosed?

CVE-2021-26623 was first published in the National Vulnerability Database on April 1, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-26623 actively exploited?

CVE-2021-26623 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-26623?

CVE-2021-26623 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.

How do I remediate CVE-2021-26623?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-26623, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-26623

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-26623?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)