CVE-2016-5228

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 15%CVSS: 9.8Exploit: NoneExposed: 0

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

Stack-based buffer overflow in the PlayMacro function in ObjectXMacro.ObjectXMacro in WdMacCtl.ocx in Micro Focus Rumba 9.x before 9.3 HF 11997 and 9.4.x before 9.4 HF 12815 allows remote attackers to execute arbitrary code via a long MacroName argument. NOTE: some references mention CVE-2016-5226 but that is not a correct ID for any Rumba vulnerability.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Track*)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
96.4%
KEV
Not listed

Published

July 3, 2016

Last Modified

May 6, 2026

Advisory Details (4)

Auto-updated May 8, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🟡 PoC Available

Micro Focus Rumba 9.3 - ActiveX Stack Buffer Overflow (PoC) - Windows dos Exploit

https://www.exploit-db.com/exploits/40649/
generic

Micro Focus Rumba+ v9.4 Multiple Stack Buffer Overflow Vulnerabilities - CXSecurity.com

https://cxsecurity.com/issue/WLB-2016050136
generic🔴 Active Exploitation

Zero Science Lab — Information Security Research & Development Laboratory

http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5327.php
generic
http://community.microfocus.com/microfocus/mainframe_solutions/rumba/w/knowledge_base/28600.micro-focus-rumba-9-x-security-update.aspx

Data Freshness Timeline

(refreshed 12× in last 7d / 41× 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 102 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-40649✓ verified
    First seen Oct 31, 2016

    Micro Focus Rumba 9.3 - ActiveX Stack Buffer Overflow (PoC)

    Open source ↗

Frequently asked(5)

What is CVE-2016-5228?
CVE-2016-5228 is a critical vulnerability published on July 3, 2016. Stack-based buffer overflow in the PlayMacro function in ObjectXMacro.ObjectXMacro in WdMacCtl.ocx in Micro Focus Rumba 9.x before 9.3 HF 11997 and 9.4.x before 9.4 HF 12815 allows remote attackers to execute arbitrary code via a long MacroName argument. NOTE: some references mention CVE-2016-5226…
When was CVE-2016-5228 disclosed?
CVE-2016-5228 was first published in the National Vulnerability Database on July 3, 2016, 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-2016-5228 actively exploited?
CVE-2016-5228 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-5228?
CVE-2016-5228 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-5228?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-5228, 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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