Out-of-bounds Read in Debevv Nanomodbus
CVE-2026-71256
nanoMODBUS through v1.23.0 contains an out-of-bounds stack read leading to a wild-pointer write in nmbs_read_device_identification_basic() / recv_read_device_identification_res() in nanomodbus.c. A fixed 3-element stack array order[3] = {0…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Debevv Nanomodbus — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-71256?
- CVE-2026-71256 is a critical-severity vulnerability in Debevv Nanomodbus, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2026-08-05.
- How severe is CVE-2026-71256?
- Critical severity. CVSS v3 base score is 9.8 out of 10.