IBM Sterling Connect Direct for Unix up to 6.3.0.7/6.4.0.6 apnotify utility code injection

Summaryinfo

A vulnerability, which was classified as very critical, has been found in IBM Sterling Connect Direct for Unix up to 6.3.0.7/6.4.0.6. Affected by this issue is some unknown functionality of the component apnotify utility. This manipulation causes code injection. This vulnerability appears as CVE-2026-93888. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability has been found in IBM Sterling Connect Direct for Unix up to 6.3.0.7/6.4.0.6 and classified as very critical. Affected by this vulnerability is an unknown functionality of the component apnotify utility. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

IBM Sterling Connect Direct for Unix 6.4.0.0 through 6.4.0.6 and 6.3.0.0 through 6.3.0.7 apnotify utility is vulnerable to a code injection due to insufficient validation of user input.

The advisory is shared at ibm.com. This vulnerability is known as CVE-2026-93888 since 09/18/2026. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/21/2026). MITRE ATT&CK project uses the attack technique T1059 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Business Process Management Software

Vendor

• IBM

Name

• Sterling Connect Direct for Unix

Version

• 6.3.0.0
• 6.3.0.1
• 6.3.0.2
• 6.3.0.3
• 6.3.0.4
• 6.3.0.5
• 6.3.0.6
• 6.3.0.7
• 6.4.0.0
• 6.4.0.1
• 6.4.0.2
• 6.4.0.3
• 6.4.0.4
• 6.4.0.5
• 6.4.0.6

License

• commercial

Website

• Vendor: https://www.ibm.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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