CVE-2021-2138

MEDIUMNVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.6 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 64% 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
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.6Exploit: None knownExposed: 0

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

Vulnerability in the Oracle Cloud Infrastructure Data Science Notebook Sessions. Easily exploitable vulnerability allows low privileged attacker with access to the physical communication segment attached to the hardware where the Oracle Cloud Infrastructure Data Science Notebook Sessions executes to compromise Oracle Cloud Infrastructure Data Science Notebook Sessions. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Cloud Infrastructure Data Science Notebook Sessions accessible data as well as unauthorized read access to a subset of Oracle Cloud Infrastructure Data Science Notebook Sessions accessible data. All affected customers were notified of CVE-2021-2138 by Oracle. CVSS 3.1 Base Score 4.6 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)

CVSS v3
4.6
EG Score
4.6(medium)
EG Risk
21(Track)
EG Risk 21/100SSVC: 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
Severity46% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

March 3, 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
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  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
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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 01:57 UTCEG score recompute
  8. 2026-07-22 22:43 UTCEG score recompute
  9. 2026-07-22 14:06 UTCEPSS rescore
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  11. 2026-07-21 15:22 UTCEPSS rescore
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  13. 2026-07-20 17:05 UTCEPSS rescore
  14. 2026-07-19 14:28 UTCEPSS rescore
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  19. 2026-07-16 17:00 UTCEPSS rescore
  20. 2026-07-15 16:55 UTCEPSS rescore
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  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
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  30. 2026-07-09 19:07 UTCEPSS rescore
  31. 2026-07-08 15:12 UTCEPSS rescore
  32. 2026-07-07 13:43 UTCEPSS rescore
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  35. 2026-07-06 02:21 UTCEPSS rescore
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  40. 2026-07-02 16:57 UTCEPSS rescore
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  42. 2026-06-30 23:20 UTCEPSS rescore
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  44. 2026-06-28 14:05 UTCEPSS rescore
  45. 2026-06-28 04:54 UTCEPSS rescore
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  47. 2026-06-27 03:06 UTCEPSS rescore
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  49. 2026-06-25 13:48 UTCEPSS rescore
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  51. 2026-06-24 14:03 UTCEPSS rescore
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  53. 2026-06-23 21:31 UTCEPSS rescore
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  55. 2026-06-22 14:24 UTCEPSS rescore
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  57. 2026-06-21 14:55 UTCEPSS rescore
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  61. 2026-06-19 19:24 UTCEPSS rescore
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  63. 2026-06-18 17:51 UTCEPSS rescore
  64. 2026-06-18 17:51 UTCEPSS rescore
  65. 2026-06-17 17:51 UTCEPSS rescore
  66. 2026-06-16 17:51 UTCEPSS rescore
  67. 2026-06-15 17:46 UTCEPSS rescore
  68. 2026-06-14 23:15 UTCEPSS rescore
  69. 2026-06-13 22:58 UTCEPSS rescore
  70. 2026-06-13 22:58 UTCEPSS rescore
  71. 2026-06-12 23:10 UTCEPSS rescore
  72. 2026-06-11 13:58 UTCEPSS rescore
  73. 2026-06-10 22:16 UTCEPSS rescore
  74. 2026-06-10 13:20 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-2138?
CVE-2021-2138 is a medium vulnerability published on March 3, 2021. Vulnerability in the Oracle Cloud Infrastructure Data Science Notebook Sessions. Easily exploitable vulnerability allows low privileged attacker with access to the physical communication segment attached to the hardware where the Oracle Cloud Infrastructure Data Science Notebook Sessions executes…
When was CVE-2021-2138 disclosed?
CVE-2021-2138 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-2021-2138 actively exploited?
CVE-2021-2138 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 63.1% of all scored CVEs.
What is the CVSS score of CVE-2021-2138?
CVE-2021-2138 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2021-2138?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-2138, 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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