CVE-2026-71256

Summary

The flaw in nanoMODBUS allows an out-of-bounds stack read, leading to a potential wild-pointer write. This can be exploited by an attacker to gain unauthorized access or cause system instability.

Exploitability

Exploitation is relatively easy given the lack of bounds checking. An attacker needs to send a crafted object_id value (0-255) to trigger the vulnerability.

Blast radius

If exploited, the impact could be severe, potentially leading to remote code execution or system compromise.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to nanoMODBUS v1.23.1 or later.

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.