CVE-2021-21978

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.4% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 99%
CISA-KEV: Not listedEPSS: 99%CVSS: 9.8Exploit: NoneExposed: 0

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

VMware View Planner 4.x prior to 4.6 Security Patch 1 contains a remote code execution vulnerability. Improper input validation and lack of authorization leading to arbitrary file upload in logupload web application. An unauthorized attacker with network access to View Planner Harness could upload and execute a specially crafted file leading to remote code execution within the logupload container.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.9%
KEV
Not listed

Published

March 3, 2021

Last Modified

November 21, 2024

References (4)

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 2× in last 7d / 5× 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. 2026-07-21 15:22 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-11 08:25 UTCEPSS rescore
  4. 2026-07-04 06:29 UTCEPSS rescore
  5. 2026-07-04 06:29 UTCEPSS rescore
  6. 2026-06-17 17:51 UTCEPSS rescore
  7. 2026-06-15 17:46 UTCEPSS rescore
  8. 2026-06-14 23:15 UTCEPSS rescore
  9. 2026-06-13 22:58 UTCEPSS rescore
  10. 2026-06-12 23:10 UTCEPSS rescore
  11. 2026-06-12 23:10 UTCEPSS rescore
  12. 2026-06-10 22:16 UTCEPSS rescore
  13. 2026-06-10 22:16 UTCEPSS rescore
  14. 2026-06-07 15:23 UTCEPSS rescore
  15. 2026-06-07 15:23 UTCEPSS rescore
  16. 2026-06-05 22:45 UTCEPSS rescore
  17. 2026-06-05 22:45 UTCEPSS rescore
  18. 2026-06-01 13:50 UTCEPSS rescore
  19. 2026-06-01 13:50 UTCEPSS rescore
  20. 2026-05-31 22:29 UTCEPSS rescore
  21. 2026-05-31 22:29 UTCEPSS rescore
  22. 2026-05-31 00:15 UTCEPSS rescore
  23. 2026-05-31 00:15 UTCEPSS rescore
  24. 2026-05-28 13:43 UTCEPSS rescore
  25. 2026-05-28 13:43 UTCEPSS rescore
Show 6 more
  1. 2026-05-26 20:13 UTCEG score recompute
  2. 2026-05-26 20:13 UTCGHSA enrichment
  3. 2026-05-26 07:17 UTCEPSS rescore
  4. 2026-05-26 07:17 UTCEPSS rescore
  5. 2026-05-24 16:49 UTCEPSS rescore
  6. 2026-05-23 09:01 UTCOSV refresh

Publicly available exploits

(5 references)

Working exploit code is in the public domain (1 Metasploit module) (3 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCskytina/CVE-2021-21978
    First seen Mar 5, 2021

    带回显版本的漏洞利用脚本

    Open source ↗
  • GitHub PoCGreyOrder/CVE-2021-21978
    First seen Mar 5, 2021

    CVE-2021-21978 exp

    Open source ↗
  • GitHub PoCme1ons/CVE-2021-21978
    First seen Mar 5, 2021

    CVE-2021-21978 EXP

    Open source ↗
  • Metasploitexploit/linux/http/vmware_view_planner_4_6_uploadlog_rce✓ verified
    First seen Mar 2, 2021

    VMware View Planner Unauthenticated Log File Upload RCE

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-21978.yaml
    First seen Jan 1, 2021

    VMware View Planner <4.6 SP1- Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-21978?
CVE-2021-21978 is a critical vulnerability published on March 3, 2021. VMware View Planner 4.x prior to 4.6 Security Patch 1 contains a remote code execution vulnerability. Improper input validation and lack of authorization leading to arbitrary file upload in logupload web application. An unauthorized attacker with network access to View Planner Harness could upload…
When was CVE-2021-21978 disclosed?
CVE-2021-21978 was first published in the National Vulnerability Database on March 3, 2021, 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-2021-21978 actively exploited?
CVE-2021-21978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-21978?
CVE-2021-21978 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-21978?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21978, 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

Explore the affected products and dependency analysis for CVE-2021-21978

Explore →

Is Your Infrastructure Affected by CVE-2021-21978?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs