CVE-2019-5079: wago pfc_100_firmware Out-of-bounds Write
Vulnerability summary
CVE-2019-5079 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in wago pfc_100_firmware. EPSS estimates a 3.32% chance of exploitation in the next 30 days, higher than 88.4% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 18-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An exploitable heap buffer overflow vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A specially crafted set of packets can cause a heap buffer overflow, potentially resulting in code execution. An attacker can send unauthenticated packets to trigger this vulnerability.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
3.32%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.32% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (talosintelligence.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Wago2 products
- pfc_100_firmware03.00.39\(12\)
- pfc_200_firmware03.00.39\(12\) | 03.01.07\(13\)
1 vendor · 2 products
References
1 links- talosintelligence.com/vulnerability_reports/TALOS-2019-0871X Refsource MISCExploitThird Party Advisory