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CVE-2016-5228

52
FAUCET Score

CVE-2016-5228 is a critical stack-based buffer overflow vulnerability affecting Micro Focus Rumba 9.x and 9.4.x, specifically within the ObjectXMacro.ObjectXMacro ActiveX control, allowing remote attackers to execute arbitrary code. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and potential for complete system compromise without requiring user interaction. While not listed on CISA's KEV catalog, a public Proof-of-Concept exploit (EDB-40649) is available, and it has garnered significant community discussion with 22 mentions, indicating active interest. The vulnerability is also designated as "Active" on the Hot List.

Impacted Technologies

VendorProductVersion(s)CPE
9.4CPE matchmatch criteria
cpe:2.3:a:microfocus:rumba:9.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
15.12%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-40649 · Oct 31, 2016
This CVE's current EPSS score of 0.1512 is in the 92nd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

community.microfocus.com / microfocus/mainframe_solutions/rumba/w/knowledge_base/28600.micro-focus-rumba-9-x-security-update.aspx
cxsecurity.com / issue/WLB-2016050136
exploit-db.com / exploits/40649
zeroscience.mk / en/vulnerabilities/ZSL-2016-5327.php