What is CVE-2018-18759?

CVE-2018-18759 is a high-severity vulnerability in Modbustools Modbus Slave, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2018-11-16.

How severe is CVE-2018-18759?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Modbustools Modbus Slave

CVE-2018-18759

Modbus Slave 7.0.0 in modbus tools has a Buffer Overflow.

Vulnerability class: Buffer Overflow

Published 2018-11-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.087 (95.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.087 · newest: 0.087 · change: 0.000

Affected products

Modbustools Modbus Slave — versions 7.0.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

packetstormsecurity.com/files/150015/Modbus-Slave-7.0.0-Denial-Of-Service.html (Exploit, VDB Entry, Third Party Advisory)
www.exploit-db.com/exploits/45732/ (Exploit, VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2018-18759?: CVE-2018-18759 is a high-severity vulnerability in Modbustools Modbus Slave, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2018-11-16.
How severe is CVE-2018-18759?: High severity. CVSS v3 base score is 7.5 out of 10.