Buffer overflow in Debevv Nanomodbus
CVE-2026-54410
nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.005 (45.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.005 · change: -0.003
Affected products
- Debevv Nanomodbus — versions 0
Weakness classification (CWE)
References
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (technical-description)
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (technical-description)
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)
Frequently asked questions
- What is CVE-2026-54410?
- CVE-2026-54410 is a high-severity vulnerability in Debevv Nanomodbus, classified under Off-by-one Error. CVSS score: 8.6/10. Published 2026-06-14.
- How severe is CVE-2026-54410?
- High severity. CVSS v3 base score is 8.6 out of 10.