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Vulnerability record · CVE-2017-6025 · published 19 May 2017

CVE-2017-6025: Codesys web server stack-based buffer overflow vulnerability

Codesys · Web Server

A Stack Buffer Overflow issue was discovered in 3S-Smart Software Solutions GmbH CODESYS Web Server. The following versions of CODESYS Web Server, part of the CODESYS WebVisu web browser visualization software, are affected: CODESYS Web Server Versions 2.3 and prior. A malicious user could overflow the stack buffer by providing overly long strings to functions that handle the XML. Because the function does not verify string size before copying to memory, the attacker may then be able to crash the application or run arbitrary code.

9.8 CVSS 3.0 Critical EPSS 2.0% · top 20.1% CWE-121 · Stack-based buffer overflowCWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

A Stack Buffer Overflow issue was discovered in 3S-Smart Software Solutions GmbH CODESYS Web Server. The following versions of CODESYS Web Server, part of the CODESYS WebVisu web browser visualization software, are affected: CODESYS Web Server Versions 2.3 and prior. A malicious user could overflow the stack buffer by providing overly long strings to functions that handle the XML. Because the function does not verify string size before copying to memory, the attacker may then be able to crash the application or run arbitrary code.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/97174 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-087-02 Third Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/97174 Third Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-087-02 Third Party AdvisoryUS Government Resource

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Source: NIST National Vulnerability Database (record CVE-2017-6025), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.