CVE-2026-16856 IBM i is Affected By Multiple Vulnerabilities in Domain Name System
A local attacker can execute arbitrary OS commands to gain elevated privileges on IBM i systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16856?
CVE-2026-16856 is a high-severity command injection vulnerability in Ibm I, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM i 7.6, and 7.5 could allow a local attacker to gain elevated privileges due to improper neutralization of special elements used in an OS command.
Weakness: CWE-78
Which versions are affected by CVE-2026-16856?
It affects 1 product.
Products include Ibm I.
How do I fix CVE-2026-16856?
No fix has been published for CVE-2026-16856 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-16856 being exploited?
There is no known exploitation of CVE-2026-16856 in the wild and no public exploit code.
Other vulnerabilities in Ibm I
- CVE-2026-96119 IBM i is Affected By An Improper Control of Code Generation Vulnerability in HTTP Server Administration GUI
- CVE-2026-16860 IBM i is Affected By Remote Code Execution Vulnerability []
- CVE-2026-17083 IBM i is Affected By Multiple Vulnerabilities in the Debug Server
- CVE-2026-17218 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon []
- CVE-2026-17276 IBM i is Affected By Multiple Vulnerabilities in Navigator for i
Sources
Also known as GHSA-67x9-wvm5-8cxw.