How severe is CVE-2016-5228?

CVE-2016-5228 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-5228 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5228?

CVE-2016-5228 affects Microfocus Rumba. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-5228?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-5228 published?

CVE-2016-5228 was published on 2016-07-03 and last updated on 2026-06-17.

CVE-2016-5228

CVE-2016-5228 is a critical-severity vulnerability in Microfocus Rumba with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 15% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 15% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Microfocus Rumba
Published: 2016-07-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2016-5228?: 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.
How severe is CVE-2016-5228?: CVE-2016-5228 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-5228 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5228?: CVE-2016-5228 affects Microfocus Rumba. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-5228?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-5228 published?: CVE-2016-5228 was published on 2016-07-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microfocus:rumba:9.4:*:*:*:*:*:*:*

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