CVE-2021-2018

HIGHNVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.3 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 30% 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
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.3Exploit: None knownExposed: 0

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

Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 18c and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Advanced Networking Option, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Advanced Networking Option. Note: CVE-2021-2018 affects Windows platform only. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).

CVSS v3
8.3
EG Score
8.3(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity83% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
71%
KEV
Not listed

Published

January 20, 2021

Last Modified

November 21, 2024

References (2)

Data Freshness Timeline

(refreshed 8× in last 7d / 35× 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 128 total refreshes for this CVE.

  1. 2026-08-20 22:52 UTCEPSS rescore
  2. 2026-08-19 17:01 UTCEPSS rescore
  3. 2026-08-18 13:45 UTCEPSS rescore
  4. 2026-08-17 13:44 UTCEPSS rescore
  5. 2026-08-16 14:53 UTCEPSS rescore
  6. 2026-08-16 02:11 UTCEPSS rescore
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  8. 2026-08-15 01:27 UTCEPSS rescore
  9. 2026-08-13 21:57 UTCEPSS rescore
  10. 2026-08-12 13:47 UTCEPSS rescore
  11. 2026-08-11 13:38 UTCEPSS rescore
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  13. 2026-08-08 16:33 UTCEPSS rescore
  14. 2026-08-07 16:23 UTCEPSS rescore
  15. 2026-08-06 13:43 UTCEPSS rescore
  16. 2026-08-05 19:14 UTCEPSS rescore
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  18. 2026-08-04 10:34 UTCEPSS rescore
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  20. 2026-08-02 02:24 UTCEPSS rescore
  21. 2026-08-01 04:13 UTCEPSS rescore
  22. 2026-07-30 16:25 UTCEPSS rescore
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  24. 2026-07-30 01:28 UTCEPSS rescore
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  1. 2026-07-28 15:33 UTCEPSS rescore
  2. 2026-07-26 14:52 UTCEPSS rescore
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  4. 2026-07-25 14:15 UTCEPSS rescore
  5. 2026-07-24 14:15 UTCEPSS rescore
  6. 2026-07-23 14:16 UTCEPSS rescore
  7. 2026-07-23 01:56 UTCEG score recompute
  8. 2026-07-22 22:43 UTCEG score recompute
  9. 2026-07-22 14:06 UTCEPSS rescore
  10. 2026-07-22 14:06 UTCEPSS rescore
  11. 2026-07-21 15:22 UTCEPSS rescore
  12. 2026-07-21 15:22 UTCEPSS rescore
  13. 2026-07-20 17:05 UTCEPSS rescore
  14. 2026-07-19 14:28 UTCEPSS rescore
  15. 2026-07-19 02:27 UTCEPSS rescore
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  17. 2026-07-18 10:02 UTCEPSS rescore
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  19. 2026-07-16 17:00 UTCEPSS rescore
  20. 2026-07-15 16:55 UTCEPSS rescore
  21. 2026-07-15 16:55 UTCEPSS rescore
  22. 2026-07-15 01:58 UTCEPSS rescore
  23. 2026-07-13 22:27 UTCEPSS rescore
  24. 2026-07-13 22:27 UTCEPSS rescore
  25. 2026-07-13 06:10 UTCEPSS rescore
  26. 2026-07-12 05:44 UTCEPSS rescore
  27. 2026-07-12 05:44 UTCEPSS rescore
  28. 2026-07-11 08:25 UTCEPSS rescore
  29. 2026-07-11 08:25 UTCEPSS rescore
  30. 2026-07-09 19:07 UTCEPSS rescore
  31. 2026-07-08 15:12 UTCEPSS rescore
  32. 2026-07-06 16:25 UTCEPSS rescore
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  34. 2026-07-06 02:21 UTCEPSS rescore
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  36. 2026-07-05 02:28 UTCEPSS rescore
  37. 2026-07-04 06:29 UTCEPSS rescore
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  39. 2026-07-02 16:57 UTCEPSS rescore
  40. 2026-07-01 15:03 UTCEPSS rescore
  41. 2026-06-30 23:20 UTCEPSS rescore
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  43. 2026-06-28 14:05 UTCEPSS rescore
  44. 2026-06-28 04:54 UTCEPSS rescore
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  46. 2026-06-27 03:06 UTCEPSS rescore
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  48. 2026-06-25 13:48 UTCEPSS rescore
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  50. 2026-06-24 14:03 UTCEPSS rescore
  51. 2026-06-24 14:03 UTCEPSS rescore
  52. 2026-06-23 21:31 UTCEPSS rescore
  53. 2026-06-23 21:31 UTCEPSS rescore
  54. 2026-06-22 14:24 UTCEPSS rescore
  55. 2026-06-22 14:24 UTCEPSS rescore
  56. 2026-06-21 14:55 UTCEPSS rescore
  57. 2026-06-21 14:54 UTCEPSS rescore
  58. 2026-06-21 01:58 UTCEPSS rescore
  59. 2026-06-21 01:58 UTCEPSS rescore
  60. 2026-06-19 19:24 UTCEPSS rescore
  61. 2026-06-19 19:24 UTCEPSS rescore
  62. 2026-06-18 17:51 UTCEPSS rescore
  63. 2026-06-18 17:51 UTCEPSS rescore
  64. 2026-06-17 17:51 UTCEPSS rescore
  65. 2026-06-16 17:51 UTCEPSS rescore
  66. 2026-06-15 17:46 UTCEPSS rescore
  67. 2026-06-14 23:15 UTCEPSS rescore
  68. 2026-06-13 22:58 UTCEPSS rescore
  69. 2026-06-13 22:58 UTCEPSS rescore
  70. 2026-06-12 23:10 UTCEPSS rescore
  71. 2026-06-11 13:58 UTCEPSS rescore
  72. 2026-06-10 22:16 UTCEPSS rescore
  73. 2026-06-10 13:20 UTCEPSS rescore
  74. 2026-06-08 14:15 UTCEPSS rescore
  75. 2026-06-07 15:23 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-2018?
CVE-2021-2018 is a high vulnerability published on January 20, 2021. Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 18c and 19c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful…
When was CVE-2021-2018 disclosed?
CVE-2021-2018 was first published in the National Vulnerability Database on January 20, 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-2021-2018 actively exploited?
CVE-2021-2018 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.9% of all scored CVEs.
What is the CVSS score of CVE-2021-2018?
CVE-2021-2018 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2021-2018?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-2018, 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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