CVE-2021-44320

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Parrot AR.Drone version 1 and 2 does not employ a suitable mechanism to prevent denial-of-service (DoS) attacks. An attacker can harm the device availability (i.e., video streaming and control) by using tool to perform an IPv4 flood attack. Verified attacks includes SYN flooding and UDP flooding.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

cve/CVE-2021-44320 at main · gubertoli/cve · GitHub

https://github.com/gubertoli/cve/tree/main/CVE-2021-44320

Vendor Advisories for CVE-2021-44320(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 71× 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. 2026-09-20 20:13 UTCEPSS rescore
  2. 2026-09-20 16:39 UTCGHSA enrichment
  3. 2026-09-20 05:17 UTCGHSA enrichment
  4. 2026-09-19 17:56 UTCEG score recompute
  5. 2026-09-19 17:56 UTCGHSA enrichment
  6. 2026-09-19 15:38 UTCEPSS rescore
  7. 2026-09-19 06:36 UTCEG score recompute
  8. 2026-09-19 06:36 UTCGHSA enrichment
  9. 2026-09-18 19:23 UTCEPSS rescore
  10. 2026-09-18 19:15 UTCGHSA enrichment
  11. 2026-09-18 07:52 UTCGHSA enrichment
  12. 2026-09-17 20:32 UTCEG score recompute
  13. 2026-09-17 20:32 UTCGHSA enrichment
  14. 2026-09-17 19:23 UTCEPSS rescore
  15. 2026-09-17 19:23 UTCEPSS rescore
  16. 2026-09-17 08:40 UTCGHSA enrichment
  17. 2026-09-16 21:19 UTCEG score recompute
  18. 2026-09-16 21:19 UTCGHSA enrichment
  19. 2026-09-16 14:05 UTCEPSS rescore
  20. 2026-09-16 09:43 UTCEG score recompute
  21. 2026-09-16 09:43 UTCGHSA enrichment
  22. 2026-09-15 22:22 UTCGHSA enrichment
  23. 2026-09-15 11:00 UTCEG score recompute
  24. 2026-09-15 11:00 UTCGHSA enrichment
  25. 2026-09-15 03:06 UTCEPSS rescore
Show 46 more
  1. 2026-09-14 23:33 UTCGHSA enrichment
  2. 2026-09-14 12:12 UTCGHSA enrichment
  3. 2026-09-14 00:51 UTCEG score recompute
  4. 2026-09-14 00:51 UTCGHSA enrichment
  5. 2026-09-13 13:31 UTCGHSA enrichment
  6. 2026-09-13 02:11 UTCEG score recompute
  7. 2026-09-13 02:11 UTCGHSA enrichment
  8. 2026-09-12 14:57 UTCEPSS rescore
  9. 2026-09-12 14:50 UTCGHSA enrichment
  10. 2026-09-12 03:29 UTCGHSA enrichment
  11. 2026-09-11 16:08 UTCEG score recompute
  12. 2026-09-11 16:08 UTCGHSA enrichment
  13. 2026-09-11 14:49 UTCEPSS rescore
  14. 2026-09-11 09:33 UTCEPSS rescore
  15. 2026-09-11 04:45 UTCGHSA enrichment
  16. 2026-09-10 17:25 UTCEG score recompute
  17. 2026-09-10 17:25 UTCGHSA enrichment
  18. 2026-09-10 06:04 UTCGHSA enrichment
  19. 2026-09-09 18:41 UTCGHSA enrichment
  20. 2026-09-09 07:20 UTCEG score recompute
  21. 2026-09-09 07:20 UTCGHSA enrichment
  22. 2026-09-08 21:56 UTCEPSS rescore
  23. 2026-09-08 19:59 UTCGHSA enrichment
  24. 2026-09-08 16:26 UTCGHSA enrichment
  25. 2026-09-08 03:53 UTCGHSA enrichment
  26. 2026-09-07 16:32 UTCEG score recompute
  27. 2026-09-07 16:32 UTCGHSA enrichment
  28. 2026-09-07 15:58 UTCEPSS rescore
  29. 2026-09-07 05:11 UTCGHSA enrichment
  30. 2026-09-06 17:47 UTCEG score recompute
  31. 2026-09-06 17:47 UTCGHSA enrichment
  32. 2026-09-06 13:45 UTCEPSS rescore
  33. 2026-09-06 06:26 UTCGHSA enrichment
  34. 2026-09-05 19:06 UTCEG score recompute
  35. 2026-09-05 19:06 UTCGHSA enrichment
  36. 2026-09-05 15:25 UTCEPSS rescore
  37. 2026-09-05 07:46 UTCEG score recompute
  38. 2026-09-05 07:46 UTCGHSA enrichment
  39. 2026-09-04 20:25 UTCGHSA enrichment
  40. 2026-09-04 19:30 UTCEG score recompute▲ 7.50
  41. 2026-09-04 19:30 UTCGHSA enrichment
  42. 2026-09-04 19:29 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  43. 2026-09-04 18:41 UTCGHSA enrichment
  44. 2026-09-04 18:26 UTCNVD update
  45. 2026-09-04 17:21 UTCEG score recompute
  46. 2026-09-04 17:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-44320?
CVE-2021-44320 is a high vulnerability published on September 4, 2026. Parrot AR.Drone version 1 and 2 does not employ a suitable mechanism to prevent denial-of-service (DoS) attacks. An attacker can harm the device availability (i.e., video streaming and control) by using tool to perform an IPv4 flood attack. Verified attacks includes SYN flooding and UDP flooding.
When was CVE-2021-44320 disclosed?
CVE-2021-44320 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-44320 actively exploited?
CVE-2021-44320 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.0% of all scored CVEs.
What is the CVSS score of CVE-2021-44320?
CVE-2021-44320 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2021-44320?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-44320, 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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