CVE-2023-20213

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2023-11-01. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

A vulnerability in the CDP processing feature of Cisco ISE could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of the CDP process on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes CDP traffic. An attacker could exploit this vulnerability by sending crafted CDP traffic to the device. A successful exploit could cause the CDP process to crash, impacting neighbor discovery and the ability of Cisco ISE to determine the reachability of remote devices. After a crash, the CDP process must be manually restarted using the cdp enable command in interface configuration mode.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

November 1, 2023

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 7× in last 7d / 39× 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.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-08-09 13:44 UTCEPSS rescore
  2. 2026-08-08 16:34 UTCEPSS rescore
  3. 2026-08-07 16:24 UTCEPSS rescore
  4. 2026-08-06 13:44 UTCEPSS rescore
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  10. 2026-07-30 16:26 UTCEPSS rescore
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  13. 2026-07-28 15:34 UTCEPSS rescore
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  19. 2026-07-23 14:16 UTCEPSS rescore
  20. 2026-07-23 14:16 UTCEPSS rescore
  21. 2026-07-23 02:18 UTCEG score recompute
  22. 2026-07-22 23:05 UTCEG score recompute
  23. 2026-07-22 14:06 UTCEPSS rescore
  24. 2026-07-21 15:23 UTCEPSS rescore
  25. 2026-07-20 17:05 UTCEPSS rescore
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  1. 2026-07-19 14:29 UTCEPSS rescore
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  3. 2026-07-19 02:27 UTCEPSS rescore
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  5. 2026-07-18 10:03 UTCEPSS rescore
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  7. 2026-07-16 17:01 UTCEPSS rescore
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  9. 2026-07-15 16:56 UTCEPSS rescore
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  12. 2026-07-13 22:28 UTCEPSS rescore
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  14. 2026-07-13 06:11 UTCEPSS rescore
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  17. 2026-07-11 08:25 UTCEPSS rescore
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  19. 2026-07-09 19:08 UTCEPSS rescore
  20. 2026-07-08 15:13 UTCEPSS rescore
  21. 2026-07-07 13:44 UTCEPSS rescore
  22. 2026-07-06 16:26 UTCEPSS rescore
  23. 2026-07-06 16:25 UTCEPSS rescore
  24. 2026-07-06 02:21 UTCEPSS rescore
  25. 2026-07-05 02:28 UTCEPSS rescore
  26. 2026-07-04 06:29 UTCEPSS rescore
  27. 2026-07-04 06:29 UTCEPSS rescore
  28. 2026-07-02 16:58 UTCEPSS rescore
  29. 2026-07-01 15:04 UTCEPSS rescore
  30. 2026-06-30 23:21 UTCEPSS rescore
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  36. 2026-06-27 03:07 UTCEPSS rescore
  37. 2026-06-25 13:48 UTCEPSS rescore
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  39. 2026-06-24 14:03 UTCEPSS rescore
  40. 2026-06-24 14:03 UTCEPSS rescore
  41. 2026-06-23 21:31 UTCEPSS rescore
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  43. 2026-06-22 14:24 UTCEPSS rescore
  44. 2026-06-22 14:24 UTCEPSS rescore
  45. 2026-06-21 14:55 UTCEPSS rescore
  46. 2026-06-21 14:55 UTCEPSS rescore
  47. 2026-06-21 01:58 UTCEPSS rescore
  48. 2026-06-21 01:58 UTCEPSS rescore
  49. 2026-06-19 19:24 UTCEPSS rescore
  50. 2026-06-19 19:24 UTCEPSS rescore
  51. 2026-06-18 17:51 UTCEPSS rescore
  52. 2026-06-18 17:51 UTCEPSS rescore
  53. 2026-06-17 17:51 UTCEPSS rescore
  54. 2026-06-17 17:51 UTCEPSS rescore
  55. 2026-06-16 17:51 UTCEPSS rescore
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  58. 2026-06-15 17:47 UTCEPSS rescore
  59. 2026-06-14 23:16 UTCEPSS rescore
  60. 2026-06-13 22:59 UTCEPSS rescore
  61. 2026-06-12 23:10 UTCEPSS rescore
  62. 2026-06-11 13:59 UTCEPSS rescore
  63. 2026-06-11 13:58 UTCEPSS rescore
  64. 2026-06-10 22:17 UTCEPSS rescore
  65. 2026-06-10 13:21 UTCEPSS rescore
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  67. 2026-06-08 14:15 UTCEPSS rescore
  68. 2026-06-08 14:15 UTCEPSS rescore
  69. 2026-06-07 15:23 UTCEPSS rescore
  70. 2026-06-07 15:23 UTCEPSS rescore
  71. 2026-06-06 13:46 UTCEPSS rescore
  72. 2026-06-06 13:46 UTCEPSS rescore
  73. 2026-06-05 22:46 UTCEPSS rescore
  74. 2026-06-05 22:46 UTCEPSS rescore
  75. 2026-06-05 22:46 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-20213?
CVE-2023-20213 is a medium vulnerability published on November 1, 2023. A vulnerability in the CDP processing feature of Cisco ISE could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of the CDP process on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes CDP…
When was CVE-2023-20213 disclosed?
CVE-2023-20213 was first published in the National Vulnerability Database on November 1, 2023, 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-2023-20213 actively exploited?
CVE-2023-20213 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 77.6% of all scored CVEs.
What is the CVSS score of CVE-2023-20213?
CVE-2023-20213 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2023-20213?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-20213, 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.

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