← Vulnerability feed

Vulnerability record · CVE-2020-12497 · published 1 July 2020

CVE-2020-12497: Phoenixcontact pc worx stack-based buffer overflow vulnerability

Phoenixcontact · Pc Worx

PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.

7.8 CVSS 3.1 High EPSS 15% · top 3.5% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score, v2 6.8
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.

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

Affected products

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

References

LinkTags
https://cert.vde.com/de-de/advisories/vde-2020-023 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-825/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-398/ Third Party AdvisoryVDB Entry
https://cert.vde.com/de-de/advisories/vde-2020-023 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-825/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-398/ Third Party AdvisoryVDB Entry

Track CVE-2020-12497 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-46141Phoenixcontact automationworx software suite incorrect permission assignment vulnerabilityIncorrect Permission Assignment for Critical Resource vulnerability in multiple products of the PHOENIX CONTACT classic line allow an remote unauthen…EPSS 0.88%7.8CVE-2021-34597Phoenixcontact pc worx improper input validation vulnerabilityImproper Input Validation vulnerability in PC Worx Automation Suite of Phoenix Contact up to version 1.88 could allow an attacker with a manipulated …EPSS 0.65%7.8CVE-2020-12498Phoenixcontact pc worx stack-based buffer overflow vulnerabilitymwe file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier is vulnerable to out-of-bounds read remote code execution. M…EPSS 2.1%7.8CVE-2019-16675Phoenixcontact config\+ out-of-bounds read vulnerabilityAn issue was discovered in PHOENIX CONTACT PC Worx through 1.86, PC Worx Express through 1.86, and Config+ through 1.86. A manipulated PC Worx or Con…EPSS 3.3%7.5CVE-2023-46143Phoenixcontact automationworx software suite download of code without integrity check vulnerabilityDownload of Code Without Integrity Check vulnerability in PHOENIX CONTACT classic line PLCs allows an unauthenticated remote attacker to modify some …EPSS 0.33%7.0CVE-2021-33542Phoenixcontact config\+ vulnerabilityPhoenix Contact Classic Automation Worx Software Suite in Version 1.87 and below is affected by a remote code execution vulnerability. Manipulated PC…EPSS 1.8%8.8CVE-2026-7273Zyxel gs1900-8 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-base…KEVEPSS 2.5%8.1CVE-2021-27137DD-WRT UPnP M-SEARCH stack buffer overflowDD-WRT before 45724 contains an unsafe strcpy in the UPnP SSDP handling code (ssdp_msearch), reachable via an M-SEARCH request, that overflows a fixe…KEVEPSS 4.0%analysed

Source: NIST National Vulnerability Database (record CVE-2020-12497), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.