CVE-2020-2555

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 97%CVSS: 9.8Exploit: NoneExposed: 0

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

Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation). Supported versions that are affected are 3.7.1.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 to compromise Oracle Coherence. Successful attacks of this vulnerability can result in takeover of Oracle Coherence. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
99.9%
KEV
⚠ Exploited

Published

January 15, 2020

Last Modified

October 27, 2025

Advisory Details (2)

Auto-updated Jun 1, 2026
No patch confirmed yet.
generic

Packet Storm

http://packetstormsecurity.com/files/157054/Oracle-Coherence-Fusion-Middleware-Remote-Code-Execution.html
generic

Packet Storm

http://packetstormsecurity.com/files/157795/WebLogic-Server-Deserialization-Remote-Code-Execution.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 43× in last 7d / 195× 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 363 total refreshes for this CVE.

  1. 2026-07-23 01:51 UTCEG score recompute
  2. 2026-07-22 21:44 UTCEG score recompute
  3. 2026-07-22 21:44 UTCGHSA enrichment
  4. 2026-07-22 19:40 UTCCISA KEV update
  5. 2026-07-22 17:39 UTCGHSA enrichment
  6. 2026-07-22 13:31 UTCGHSA enrichment
  7. 2026-07-22 09:27 UTCGHSA enrichment
  8. 2026-07-22 05:23 UTCGHSA enrichment
  9. 2026-07-22 01:18 UTCGHSA enrichment
  10. 2026-07-21 21:13 UTCGHSA enrichment
  11. 2026-07-21 17:08 UTCEG score recompute
  12. 2026-07-21 17:08 UTCGHSA enrichment
  13. 2026-07-21 15:22 UTCEPSS rescore
  14. 2026-07-21 15:22 UTCEPSS rescore
  15. 2026-07-21 14:37 UTCCISA KEV update
  16. 2026-07-21 13:03 UTCGHSA enrichment
  17. 2026-07-21 08:58 UTCGHSA enrichment
  18. 2026-07-21 04:54 UTCGHSA enrichment
  19. 2026-07-21 00:49 UTCGHSA enrichment
  20. 2026-07-20 20:45 UTCGHSA enrichment
  21. 2026-07-20 16:41 UTCGHSA enrichment
  22. 2026-07-20 12:37 UTCGHSA enrichment
  23. 2026-07-20 08:33 UTCGHSA enrichment
  24. 2026-07-20 04:30 UTCGHSA enrichment
  25. 2026-07-19 20:20 UTCGHSA enrichment
Show 75 more
  1. 2026-07-19 16:15 UTCGHSA enrichment
  2. 2026-07-19 12:03 UTCGHSA enrichment
  3. 2026-07-19 07:58 UTCGHSA enrichment
  4. 2026-07-19 03:54 UTCGHSA enrichment
  5. 2026-07-18 23:50 UTCGHSA enrichment
  6. 2026-07-18 19:46 UTCGHSA enrichment
  7. 2026-07-18 15:42 UTCGHSA enrichment
  8. 2026-07-18 11:38 UTCGHSA enrichment
  9. 2026-07-18 07:34 UTCGHSA enrichment
  10. 2026-07-18 03:30 UTCGHSA enrichment
  11. 2026-07-17 23:26 UTCGHSA enrichment
  12. 2026-07-17 19:22 UTCGHSA enrichment
  13. 2026-07-17 15:18 UTCGHSA enrichment
  14. 2026-07-17 11:14 UTCGHSA enrichment
  15. 2026-07-17 07:10 UTCEG score recompute
  16. 2026-07-17 07:10 UTCGHSA enrichment
  17. 2026-07-17 03:06 UTCGHSA enrichment
  18. 2026-07-16 23:02 UTCGHSA enrichment
  19. 2026-07-16 18:59 UTCGHSA enrichment
  20. 2026-07-16 17:04 UTCCISA KEV update
  21. 2026-07-16 14:55 UTCGHSA enrichment
  22. 2026-07-16 10:52 UTCGHSA enrichment
  23. 2026-07-16 06:48 UTCGHSA enrichment
  24. 2026-07-16 02:45 UTCGHSA enrichment
  25. 2026-07-15 22:41 UTCGHSA enrichment
  26. 2026-07-15 18:37 UTCGHSA enrichment
  27. 2026-07-15 16:49 UTCCISA KEV update
  28. 2026-07-15 15:04 UTCCISA KEV update
  29. 2026-07-15 14:31 UTCGHSA enrichment
  30. 2026-07-15 10:26 UTCGHSA enrichment
  31. 2026-07-15 06:22 UTCGHSA enrichment
  32. 2026-07-15 02:18 UTCGHSA enrichment
  33. 2026-07-14 22:14 UTCGHSA enrichment
  34. 2026-07-14 18:10 UTCGHSA enrichment
  35. 2026-07-14 18:05 UTCCISA KEV update
  36. 2026-07-14 14:05 UTCGHSA enrichment
  37. 2026-07-14 10:01 UTCGHSA enrichment
  38. 2026-07-14 05:58 UTCGHSA enrichment
  39. 2026-07-14 01:54 UTCGHSA enrichment
  40. 2026-07-13 21:51 UTCGHSA enrichment
  41. 2026-07-13 17:47 UTCGHSA enrichment
  42. 2026-07-13 17:07 UTCCISA KEV update
  43. 2026-07-13 13:43 UTCGHSA enrichment
  44. 2026-07-13 09:39 UTCGHSA enrichment
  45. 2026-07-13 05:35 UTCGHSA enrichment
  46. 2026-07-13 01:31 UTCGHSA enrichment
  47. 2026-07-12 21:28 UTCGHSA enrichment
  48. 2026-07-12 17:24 UTCGHSA enrichment
  49. 2026-07-12 13:20 UTCGHSA enrichment
  50. 2026-07-12 09:15 UTCGHSA enrichment
  51. 2026-07-12 05:11 UTCGHSA enrichment
  52. 2026-07-12 01:07 UTCGHSA enrichment
  53. 2026-07-11 21:03 UTCGHSA enrichment
  54. 2026-07-11 16:59 UTCGHSA enrichment
  55. 2026-07-11 12:55 UTCGHSA enrichment
  56. 2026-07-11 08:51 UTCGHSA enrichment
  57. 2026-07-11 08:25 UTCEPSS rescore
  58. 2026-07-11 08:25 UTCEPSS rescore
  59. 2026-07-11 04:47 UTCGHSA enrichment
  60. 2026-07-11 00:43 UTCGHSA enrichment
  61. 2026-07-10 20:39 UTCGHSA enrichment
  62. 2026-07-10 17:52 UTCCISA KEV update
  63. 2026-07-10 16:34 UTCGHSA enrichment
  64. 2026-07-10 12:30 UTCGHSA enrichment
  65. 2026-07-10 08:26 UTCGHSA enrichment
  66. 2026-07-10 04:23 UTCGHSA enrichment
  67. 2026-07-10 00:18 UTCGHSA enrichment
  68. 2026-07-09 20:13 UTCGHSA enrichment
  69. 2026-07-09 16:10 UTCGHSA enrichment
  70. 2026-07-09 12:05 UTCGHSA enrichment
  71. 2026-07-09 08:01 UTCGHSA enrichment
  72. 2026-07-09 03:57 UTCGHSA enrichment
  73. 2026-07-08 23:53 UTCGHSA enrichment
  74. 2026-07-08 19:49 UTCGHSA enrichment
  75. 2026-07-08 15:45 UTCGHSA enrichment

Publicly available exploits

(7 references)

Working exploit code is in the public domain (1 Metasploit module) (4 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48508✓ verified
    First seen May 22, 2020

    WebLogic Server - Deserialization RCE - BadAttributeValueExpException (Metasploit)

    Open source ↗
  • Exploit-DBEDB-48320
    First seen Apr 14, 2020

    Oracle WebLogic Server 12.2.1.4.0 - Remote Code Execution

    Open source ↗
  • GitHub PoCMaskhe/cve-2020-2555
    First seen Mar 10, 2020

    CVE-2020-2555

    Open source ↗
  • GitHub PoCY4er/CVE-2020-2555
    First seen Mar 7, 2020

    Weblogic com.tangosol.util.extractor.ReflectionExtractor RCE

    Open source ↗
  • GitHub PoCwsfengfan/CVE-2020-2555
    First seen Mar 6, 2020

    CVE-2020-2555 Python POC

    Open source ↗
  • GitHub PoCHu3sky/CVE-2020-2555
    First seen Mar 6, 2020
    Open source ↗
  • Metasploitexploit/multi/misc/weblogic_deserialize_badattrval✓ verified
    First seen Jan 15, 2020

    WebLogic Server Deserialization RCE - BadAttributeValueExpException

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2020-2555?
CVE-2020-2555 is a critical vulnerability published on January 15, 2020. Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation). Supported versions that are affected are 3.7.1.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3…
When was CVE-2020-2555 disclosed?
CVE-2020-2555 was first published in the National Vulnerability Database on January 15, 2020, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-2555 actively exploited?
Yes. CISA added CVE-2020-2555 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Oracle Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2020-2555?
CVE-2020-2555 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2020-2555?
CVE-2020-2555 affects Oracle Multiple Products. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2020-2555?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-2555, 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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