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CVE-2026-29972

HIGH · CVSS 8.2 EPSS 0.07% Public Exploit

Source: NVD + CISA KEV + EPSS · Published: 2026-05-08 · Last synced: 2026-06-07

CyberRota Analysis

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Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution

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CVE
CVE-2026-29972
Severity
HIGH
CVSS
8.2
EPSS
0.07%

Original NVD Description

nanoMODBUS through v1.22.0 has a stack-based buffer overflow in recv_read_registers_res() in nanomodbus.c. When a client calls nmbs_read_holding_registers() or nmbs_read_input_registers(), the library writes register data from the server response to the caller-provided buffer based on the response's byte_count field before validating that byte_count matches the requested quantity. A malicious Modbus TCP server can send a response with byte_count=250 (125 registers) regardless of the requested quantity, causing up to 248 bytes of attacker-controlled data to overflow the buffer, potentially allowing remote code execution.