CVE-2021-22883

HIGHNVD 7.58.8▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.8 because EPSS predicts 77% probability of exploitation within the next 30 days (top 0.5% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 77%
CISA-KEV: Not listedEPSS: 77%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening, e.g. a file. If no file descriptor limit is configured, then this lead to an excessive memory usage and cause the system to run out of memory.

CVSS v3
7.5
EG Score
8.8(high)
EG Risk
75(Track)
EG Risk 75/100SSVC: 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
Severity88% × 45%
Exploitation77% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.5%
KEV
Not listed

Published

March 3, 2021

Last Modified

November 21, 2024

References (20)

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntunodejs-doc (10.19.0~dfsg-3ubuntu1.2) @ focal2026-05-26ubuntu
redhatrh-nodejs10-nodejs-0:10.24.0-1.el72021-03-15redhat
redhatrh-nodejs14-nodejs-0:14.16.0-1.el72021-03-15redhat
redhatrh-nodejs12-nodejs-0:12.21.0-1.el72021-03-15redhat
redhatnodejs:10-8020020210225153906.4cda2c842021-03-08redhat
redhatnodejs:12-8020020210302112530.4cda2c842021-03-08redhat
redhatnodejs:12-8010020210302113522.c27ad7f82021-03-08redhat
redhatnodejs:14-8030020210301172147.229f0a1c2021-03-08redhat
redhatnodejs:10-8010020210225115101.c27ad7f82021-03-08redhat
redhatnodejs:10-8030020210225164533.229f0a1c2021-03-04redhat
redhatnodejs:12-8030020210302104621.229f0a1c2021-03-04redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

All Vendor Advisories

(11)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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. 2026-07-23 01:57 UTCEG score recompute▲ 1.30
  2. 2026-07-22 22:44 UTCEG score recompute▼ 1.50
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-19 00:59 UTCOSV refresh
  7. 2026-07-15 16:55 UTCEPSS rescore
  8. 2026-07-15 16:55 UTCEPSS rescore
  9. 2026-07-13 06:10 UTCEPSS rescore
  10. 2026-07-13 06:10 UTCEPSS rescore
  11. 2026-07-11 08:25 UTCEPSS rescore
  12. 2026-07-09 19:07 UTCEPSS rescore
  13. 2026-07-05 02:28 UTCEPSS rescore
  14. 2026-07-05 02:28 UTCEPSS rescore
  15. 2026-07-02 16:57 UTCEPSS rescore
  16. 2026-07-01 07:48 UTCOSV refresh
  17. 2026-06-30 23:20 UTCEPSS rescore
  18. 2026-06-30 23:20 UTCEPSS rescore
  19. 2026-06-29 14:04 UTCEPSS rescore
  20. 2026-06-29 14:04 UTCEPSS rescore
  21. 2026-06-28 04:54 UTCEPSS rescore
  22. 2026-06-28 04:54 UTCEPSS rescore
  23. 2026-06-25 13:48 UTCEPSS rescore
  24. 2026-06-25 13:48 UTCEPSS rescore
  25. 2026-06-23 21:31 UTCEPSS rescore
Show 32 more
  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-21 01:58 UTCEPSS rescore
  3. 2026-06-21 01:57 UTCEPSS rescore
  4. 2026-06-18 17:51 UTCEPSS rescore
  5. 2026-06-18 17:51 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. 2026-06-13 12:43 UTCOSV refresh
  11. 2026-06-10 22:16 UTCEPSS rescore
  12. 2026-06-10 22:16 UTCEPSS rescore
  13. 2026-06-10 13:20 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. 2026-06-05 06:09 UTCEPSS rescore
  19. 2026-06-05 06:09 UTCEPSS rescore
  20. 2026-06-05 06:08 UTCEPSS rescore
  21. 2026-06-04 13:10 UTCEPSS rescore
  22. 2026-06-02 20:11 UTCEPSS rescore
  23. 2026-06-02 20:11 UTCEPSS rescore
  24. 2026-06-01 13:50 UTCEPSS rescore
  25. 2026-06-01 13:50 UTCEPSS rescore
  26. 2026-05-29 13:42 UTCEPSS rescore
  27. 2026-05-28 13:43 UTCEPSS rescore
  28. 2026-05-28 13:43 UTCEPSS rescore
  29. 2026-05-26 20:12 UTCEG score recompute
  30. 2026-05-26 20:12 UTCVendor advisory
  31. 2026-05-26 20:12 UTCGHSA enrichment
  32. 2026-05-23 09:01 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-22883?
CVE-2021-22883 is a high vulnerability published on March 3, 2021. Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable…
When was CVE-2021-22883 disclosed?
CVE-2021-22883 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-2021-22883 actively exploited?
CVE-2021-22883 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-22883?
CVE-2021-22883 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.8.
How do I remediate CVE-2021-22883?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22883, 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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