CVE-2018-5440 json
A Stack-based Buffer Overflow issue was discovered in 3S-Smart CODESYS Web Server.
published 2018-02-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17210
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- 3s-software codesys_runtime_system 1.1.9.19
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-18-032-02 updated cvss 9.8
3S-Smart Software Solutions GmbH CODESYS Web Server
-
3S-Smart Software Solutions GmbH CODESYS Web Server 2.3, < 1.1.9.19affected: mitigation “Currently, 3S-Smart Software Solutions GmbH has not identified any workarounds for this vulnerability.” codesys.com
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Exploit prediction
3.10% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- n/a 3S-Smart Software Solutions GmbH CODESYS Web Server
Classification
References
-
securityfocus.com
/bid/102909
vdb-entry, third-party-advisory
-
ics-cert.us-cert.gov
/advisories/ICSA-18-032-02
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2018-5440
- NVD CVE-2018-5440
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.