CVE-2021-45456

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 37.8%, top 3% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 89%
CISA-KEV: Not listedEPSS: 89%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user. There is a mismatch between what is being checked and what is being used as the shell command argument in DiagnosisService. This may cause an illegal project name to pass the check and perform the following steps, resulting in a command injection vulnerability. This issue affects Apache Kylin 4.0.0.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
99.8%
KEV
Not listed

Published

January 6, 2022

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jun 20, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/70fkf9w1swt2cqdcz13rwfjvblw1fcpf
generic

oss-security - CVE-2021-45456: Apache Kylin: Command injection

http://www.openwall.com/lists/oss-security/2022/01/06/1

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.kylin:kylin0.7.1-incubating ... 4.0.0-beta (45 versions)4.0.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 1× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 13:43 UTCEPSS rescore
  2. 2026-07-02 16:57 UTCEPSS rescore
  3. 2026-06-30 00:04 UTCOSV refresh
  4. 2026-06-28 04:54 UTCEPSS rescore
  5. 2026-06-28 04:54 UTCEPSS rescore
  6. 2026-06-24 14:03 UTCEPSS rescore
  7. 2026-06-24 14:03 UTCEPSS rescore
  8. 2026-06-23 21:31 UTCEPSS rescore
  9. 2026-06-23 21:31 UTCEPSS rescore
  10. 2026-06-22 14:24 UTCEPSS rescore
  11. 2026-06-17 17:51 UTCEPSS rescore
  12. 2026-06-17 17:51 UTCEPSS rescore
  13. 2026-06-17 17:51 UTCEPSS rescore
  14. 2026-06-15 17:46 UTCEPSS rescore
  15. 2026-06-14 23:15 UTCEPSS rescore
  16. 2026-06-14 23:15 UTCEPSS rescore
  17. 2026-06-13 22:58 UTCEPSS rescore
  18. 2026-06-13 22:58 UTCEPSS rescore
  19. 2026-06-12 23:10 UTCEPSS rescore
  20. 2026-06-12 12:40 UTCOSV refresh
  21. 2026-06-11 13:58 UTCEPSS rescore
  22. 2026-06-11 13:58 UTCEPSS rescore
  23. 2026-06-10 22:16 UTCEPSS rescore
  24. 2026-06-10 22:16 UTCEPSS rescore
  25. 2026-06-10 13:20 UTCEPSS rescore
Show 26 more
  1. 2026-06-07 15:23 UTCEPSS rescore
  2. 2026-06-07 15:23 UTCEPSS rescore
  3. 2026-06-06 13:46 UTCEPSS rescore
  4. 2026-06-06 13:46 UTCEPSS rescore
  5. 2026-06-05 22:45 UTCEPSS rescore
  6. 2026-06-05 06:09 UTCEPSS rescore
  7. 2026-06-05 06:09 UTCEPSS rescore
  8. 2026-06-04 13:10 UTCEPSS rescore
  9. 2026-06-04 13:10 UTCEPSS rescore
  10. 2026-06-02 20:11 UTCEPSS rescore
  11. 2026-06-02 20:11 UTCEPSS rescore
  12. 2026-05-31 22:29 UTCEPSS rescore
  13. 2026-05-31 22:29 UTCEPSS rescore
  14. 2026-05-31 00:15 UTCEPSS rescore
  15. 2026-05-31 00:15 UTCEPSS rescore
  16. 2026-05-29 13:42 UTCEPSS rescore
  17. 2026-05-28 13:43 UTCEPSS rescore
  18. 2026-05-28 13:43 UTCEPSS rescore
  19. 2026-05-27 13:39 UTCEPSS rescore
  20. 2026-05-27 13:39 UTCEPSS rescore
  21. 2026-05-26 13:42 UTCEPSS rescore
  22. 2026-05-26 13:42 UTCEPSS rescore
  23. 2026-05-26 07:17 UTCEPSS rescore
  24. 2026-05-26 07:17 UTCEPSS rescore
  25. 2026-05-26 07:17 UTCEPSS rescore
  26. 2026-05-26 05:17 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-45456?
CVE-2021-45456 is a critical vulnerability published on January 6, 2022. Apache kylin checks the legitimacy of the project before executing some commands with the project name passed in by the user. There is a mismatch between what is being checked and what is being used as the shell command argument in DiagnosisService. This may cause an illegal project name to pass…
When was CVE-2021-45456 disclosed?
CVE-2021-45456 was first published in the National Vulnerability Database on January 6, 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-2021-45456 actively exploited?
CVE-2021-45456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-45456?
CVE-2021-45456 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-45456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45456, 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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