CVE-2026-3821 Supermicro SMASH service contain an Arbitrary code execution issue
An authorized attacker can exploit SMASH input to execute arbitrary code or cause denial of service on Supermicro BMCs.
- 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-2026-3821?
CVE-2026-3821 is a high-severity command injection vulnerability in SMCI X14DBG-DAP,X14DBI, published on 22 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Supermicro (SMC) SMASH services contain an Arbitrary code execution issue in X14DBG-DAP and X14DBI. An authorized attacker can exploit SMASH’s input capability to compromise data integrity or launch a Denial-of-Service (DoS) attack against the BMC.
Weakness: CWE-78
Which versions are affected by CVE-2026-3821?
How do I fix CVE-2026-3821?
No fix has been published for CVE-2026-3821 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-2026-3821 being exploited?
There is no known exploitation of CVE-2026-3821 in the wild and no public exploit code.
Sources
Also known as GHSA-cjff-5v28-x7h8.