CVE-2015-4870

MEDIUMCVSS v2 · 4.04.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.0 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:S/C:N/I:N/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 30.1% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Elevated
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 30%CVSS v2: 4.0Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Unspecified vulnerability in Oracle MySQL Server 5.5.45 and earlier, and 5.6.26 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server : Parser.

CVSS v2.0 (legacy)
4.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.0(low)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity40% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
30%
EPSS %ILE
98%
KEV
Not listed

Published

October 21, 2015

Last Modified

May 6, 2026

References (40)

Vendor Advisories for CVE-2015-4870(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntumysql-server-5.6 (5.6.27-0ubuntu1) @ wily2026-05-22ubuntu
redhatmysql55-mysql-0:5.5.50-1.el72016-07-25redhat
redhatmariadb55-mariadb-0:5.5.49-1.el72016-07-25redhat
redhatrh-mariadb100-mariadb-1:10.0.25-4.el72016-05-26redhat
redhatrh-mysql56-mysql-0:5.6.30-1.el72016-05-02redhat
redhatmariadb-1:5.5.47-1.el7_22016-03-31redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 3 ecosystems)
Debian:8(2)
PackageVulnerable rangeFixed inDependents
mariadb-10.010.0.16-1 ... 10.0.21-3 (13 versions)10.0.22-0+deb8u1—
mysql-5.55.5.42-1, 5.5.43-0+deb8u1, 5.5.44-0+deb8u15.5.46-0+deb8u1—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
mysql-5.55.5.17-1 ... 5.5.42-1 (36 versions)5.5.46-0+deb6u1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
mysql-5.55.5.30+dfsg-1.1 ... 5.5.44-0+deb7u1 (18 versions)5.5.46-0+deb7u1—

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 4× in last 7d / 18× 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 113 total refreshes for this CVE.

  1. 2026-09-18 19:22 UTCEPSS rescore
  2. 2026-09-17 19:21 UTCEPSS rescore
  3. 2026-09-15 03:05 UTCEPSS rescore
  4. 2026-09-12 14:55 UTCEPSS rescore
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  7. 2026-09-07 15:56 UTCEPSS rescore
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  10. 2026-09-04 13:55 UTCEPSS rescore
  11. 2026-09-02 14:07 UTCEPSS rescore
  12. 2026-09-01 03:31 UTCEPSS rescore
  13. 2026-08-30 19:12 UTCEPSS rescore
  14. 2026-08-27 14:20 UTCEPSS rescore
  15. 2026-08-26 14:41 UTCEPSS rescore
  16. 2026-08-25 13:44 UTCEPSS rescore
  17. 2026-08-21 23:44 UTCEPSS rescore
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  20. 2026-08-18 13:43 UTCEPSS rescore
  21. 2026-08-16 14:51 UTCEPSS rescore
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  24. 2026-08-12 13:46 UTCEPSS rescore
  25. 2026-08-08 16:31 UTCEPSS rescore
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  1. 2026-08-07 16:22 UTCEPSS rescore
  2. 2026-08-06 13:42 UTCEPSS rescore
  3. 2026-08-05 19:12 UTCEPSS rescore
  4. 2026-08-04 15:04 UTCEPSS rescore
  5. 2026-08-01 04:11 UTCEPSS rescore
  6. 2026-07-30 16:23 UTCEPSS rescore
  7. 2026-07-30 01:26 UTCEPSS rescore
  8. 2026-07-28 15:31 UTCEPSS rescore
  9. 2026-07-26 14:50 UTCEPSS rescore
  10. 2026-07-26 13:54 UTCEG score recompute▲ 4.00
  11. 2026-07-24 14:13 UTCEPSS rescore
  12. 2026-07-23 14:14 UTCEPSS rescore
  13. 2026-07-23 01:18 UTCEG score recompute
  14. 2026-07-23 00:20 UTCEG score recompute
  15. 2026-07-22 21:58 UTCEG score recompute
  16. 2026-07-22 14:04 UTCEPSS rescore
  17. 2026-07-21 15:21 UTCEPSS rescore
  18. 2026-07-21 15:21 UTCEPSS rescore
  19. 2026-07-20 17:03 UTCEPSS rescore
  20. 2026-07-18 10:00 UTCEPSS rescore
  21. 2026-07-16 16:59 UTCEPSS rescore
  22. 2026-07-16 16:59 UTCEPSS rescore
  23. 2026-07-15 16:54 UTCEPSS rescore
  24. 2026-07-15 16:54 UTCEPSS rescore
  25. 2026-07-13 22:26 UTCEPSS rescore
  26. 2026-07-12 05:42 UTCEPSS rescore
  27. 2026-07-11 08:23 UTCEPSS rescore
  28. 2026-07-09 19:05 UTCEPSS rescore
  29. 2026-07-08 15:10 UTCEPSS rescore
  30. 2026-07-07 13:42 UTCEPSS rescore
  31. 2026-07-06 16:24 UTCEPSS rescore
  32. 2026-07-04 06:27 UTCEPSS rescore
  33. 2026-07-02 15:21 UTCEPSS rescore
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  36. 2026-06-29 14:03 UTCEPSS rescore
  37. 2026-06-28 14:03 UTCEPSS rescore
  38. 2026-06-28 04:53 UTCEPSS rescore
  39. 2026-06-27 03:05 UTCEPSS rescore
  40. 2026-06-25 13:47 UTCEPSS rescore
  41. 2026-06-25 13:47 UTCEPSS rescore
  42. 2026-06-24 14:02 UTCEPSS rescore
  43. 2026-06-24 14:02 UTCEPSS rescore
  44. 2026-06-23 21:30 UTCEPSS rescore
  45. 2026-06-21 01:57 UTCEPSS rescore
  46. 2026-06-21 01:57 UTCEPSS rescore
  47. 2026-06-18 17:50 UTCEPSS rescore
  48. 2026-06-18 17:49 UTCEPSS rescore
  49. 2026-06-17 17:49 UTCEPSS rescore
  50. 2026-06-16 17:50 UTCEPSS rescore
  51. 2026-06-16 17:49 UTCEPSS rescore
  52. 2026-06-15 17:45 UTCEPSS rescore
  53. 2026-06-14 23:14 UTCEPSS rescore
  54. 2026-06-13 22:57 UTCEPSS rescore
  55. 2026-06-12 23:09 UTCEPSS rescore
  56. 2026-06-11 13:57 UTCEPSS rescore
  57. 2026-06-10 22:15 UTCEPSS rescore
  58. 2026-06-06 13:45 UTCEPSS rescore
  59. 2026-06-05 22:44 UTCEPSS rescore
  60. 2026-06-04 13:10 UTCEPSS rescore
  61. 2026-06-04 13:09 UTCEPSS rescore
  62. 2026-06-02 20:10 UTCEPSS rescore
  63. 2026-06-02 20:10 UTCEPSS rescore
  64. 2026-06-01 13:49 UTCEPSS rescore
  65. 2026-06-01 13:49 UTCEPSS rescore
  66. 2026-05-31 00:14 UTCEPSS rescore
  67. 2026-05-29 13:41 UTCEPSS rescore
  68. 2026-05-28 13:42 UTCEPSS rescore
  69. 2026-05-28 13:42 UTCEPSS rescore
  70. 2026-05-27 13:38 UTCEPSS rescore
  71. 2026-05-27 13:38 UTCEPSS rescore
  72. 2026-05-26 13:41 UTCEPSS rescore
  73. 2026-05-26 13:41 UTCEPSS rescore
  74. 2026-05-24 16:43 UTCEPSS rescore
  75. 2026-05-23 15:10 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-39867
    First seen May 30, 2016

    MySQL 5.5.45 - procedure analyse Function Denial of Service

    Open source ↗
  • GitHub PoCOsandaMalith/CVE-2015-4870
    First seen May 30, 2016

    MySQL DoS in the Procedure Analyse Function – CVE-2015-4870

    Open source ↗

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2015-4870?
CVE-2015-4870 is a medium vulnerability published on October 21, 2015. Unspecified vulnerability in Oracle MySQL Server 5.5.45 and earlier, and 5.6.26 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server : Parser.
When was CVE-2015-4870 disclosed?
CVE-2015-4870 was first published in the National Vulnerability Database on October 21, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-4870 actively exploited?
CVE-2015-4870 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30% probability of exploitation in the next 30 days, which ranks it in the top 1.9% of all scored CVEs.
How do I remediate CVE-2015-4870?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-4870, 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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