CVE-2022-20623

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 12.3%, top 4% 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
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 12%CVSS: 8.6Exploit: NoneExposed: 0

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

A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
—
EPSS
95.8%
KEV
Not listed

Published

February 23, 2022

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 38× 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. 2026-07-22 22:54 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-20 17:05 UTCEPSS rescore
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  15. 2026-07-13 22:27 UTCEPSS rescore
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  1. 2026-07-05 02:28 UTCEPSS rescore
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  3. 2026-06-30 23:20 UTCEPSS rescore
  4. 2026-06-28 04:54 UTCEPSS rescore
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  6. 2026-06-27 03:07 UTCEPSS rescore
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  8. 2026-06-25 13:48 UTCEPSS rescore
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  10. 2026-06-24 14:03 UTCEPSS rescore
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  12. 2026-06-23 21:31 UTCEPSS rescore
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  14. 2026-06-22 14:24 UTCEPSS rescore
  15. 2026-06-21 01:58 UTCEPSS rescore
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  17. 2026-06-18 17:51 UTCEPSS rescore
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  22. 2026-06-15 17:46 UTCEPSS rescore
  23. 2026-06-14 23:15 UTCEPSS rescore
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  25. 2026-06-13 22:58 UTCEPSS rescore
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  27. 2026-06-12 23:10 UTCEPSS rescore
  28. 2026-06-11 13:58 UTCEPSS rescore
  29. 2026-06-10 22:16 UTCEPSS rescore
  30. 2026-06-10 13:20 UTCEPSS rescore
  31. 2026-06-08 14:15 UTCEPSS rescore
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  36. 2026-06-06 13:46 UTCEPSS rescore
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  38. 2026-06-05 22:45 UTCEPSS rescore
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  40. 2026-06-04 13:11 UTCEPSS rescore
  41. 2026-06-04 13:10 UTCEPSS rescore
  42. 2026-06-02 20:11 UTCEPSS rescore
  43. 2026-06-02 20:11 UTCEPSS rescore
  44. 2026-06-01 13:50 UTCEPSS rescore
  45. 2026-06-01 13:50 UTCEPSS rescore
  46. 2026-05-31 22:29 UTCEPSS rescore
  47. 2026-05-31 00:15 UTCEPSS rescore
  48. 2026-05-31 00:15 UTCEPSS rescore
  49. 2026-05-29 13:42 UTCEPSS rescore
  50. 2026-05-28 13:43 UTCEPSS rescore
  51. 2026-05-28 13:43 UTCEPSS rescore
  52. 2026-05-27 13:39 UTCEPSS rescore
  53. 2026-05-27 13:39 UTCEPSS rescore
  54. 2026-05-26 13:43 UTCEPSS rescore
  55. 2026-05-26 13:42 UTCEPSS rescore
  56. 2026-05-26 07:17 UTCEPSS rescore
  57. 2026-05-26 07:17 UTCEPSS rescore
  58. 2026-05-26 02:37 UTCEG score recompute
  59. 2026-05-26 02:37 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-20623?
CVE-2022-20623 is a high vulnerability published on February 23, 2022. A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error…
When was CVE-2022-20623 disclosed?
CVE-2022-20623 was first published in the National Vulnerability Database on February 23, 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-2022-20623 actively exploited?
CVE-2022-20623 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-20623?
CVE-2022-20623 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2022-20623?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-20623, 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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