VULNERABILITY INTELLIGENCE

CVE-2018-5440

CVSS score9.8 CRITICAL

EPSS probability3.10%

CISA KEVNot currently listed

Published2018-02-15

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

A Stack-based Buffer Overflow issue was discovered in 3S-Smart CODESYS Web Server. Specifically: all Microsoft Windows (also WinCE) based CODESYS web servers running stand-alone Version 2.3, or as part of the CODESYS runtime system running prior to Version V1.1.9.19. A crafted request may cause a buffer overflow and could therefore execute arbitrary code on the web server or lead to a denial-of-service condition due to a crash in the web server.

Weakness classification

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

Primary references

ics-cert@hq.dhs.gov — Third Party Advisory, VDB Entry
ics-cert@hq.dhs.gov — Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource