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CVE-2019-4256

25
FAUCET Score

CVE-2019-4256 describes a cryptographic weakness in IBM API Connect versions 5.0.0.0 through 5.0.8.6, where the product utilizes weaker than expected cryptographic algorithms. This vulnerability has a CVSS score of 7.5 (High), indicating a high potential for an unauthenticated attacker to decrypt highly sensitive information over the network with low attack complexity. While the vulnerability poses a significant risk for data confidentiality, there is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or notable community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.0.0, <= 5.0.8.6CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.32%
Probability of exploitation in next 30 days
EPSS Percentile
68.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0132 is in the 48th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/159944
VDB EntryVendor Advisory
ibm.com / support/docview.wss
PatchVendor Advisory
securityfocus.com / bid/108530
Third Party AdvisoryVDB Entry