CVE-2019-5080

mediumpriority · track · 37OT risk · elevatedEPSS 0.019 · 79 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.87% (79th) EPSS
CVSS 6.4 · medium
Is it mine?
51 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

An exploitable denial-of-service vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200 Firmware versions 03.01.07(13) and 03.00.39(12), and WAGO PFC100 Firmware version 03.00.39(12). A single packet can cause a denial of service and weaken credentials resulting in the default documented credentials being applied to the device. An attacker can send an unauthenticated packet to trigger this vulnerability.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

  • Mitigationwago_psirt

    The I/O-Check service protocol is only needed during installation and commissioning, not during normal operations. It is highly recommended to disable the IP-port 6626 after commissioning.

  • MitigationI/O-CHECK Series PFC100 and Series PFC200cisa_csaf_ot

    Disable unused TCP/UDP-ports.

  • MitigationSeries PFC100cisa_csaf_ot

    Disable unused TCP/UDP-ports.

  • MitigationSeries PFC200cisa_csaf_ot

    Disable unused TCP/UDP-ports.

  • No fix plannedwago_psirt

    no fix planned

02

cvss

Technical severity, 0–10. One row per scoring source.

10.0
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.4–10

v2.06.4mediumAV:N/AC:L/Au:N/C:N/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 4.9
v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2
v3.010criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:Hsecondary · CISA US
v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hsecondary · WAGO PSIRT DE
v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306USCWE-306US
04

affected products (51)

Products and version ranges known to be affected.

showing 20 of 51
05

advisories (2)

Vendor and ecosystem advisories describing this.

  • VDE-2025-080WAGO: Multiple Vulnerabilities in I/O-Check Service2025-09-09csaf · wago_psirtDE

    A missing authentication vulnerability exists in the iocheckd service "I/O-Check" functionality. A single packet can cause a denial of service and weaken credentials resulting in the default documented credentials being applied to the device. An attacker can send an unauthenticated packet to trigger this vulnerability.

  • ICSA-20-065-01WAGO I/O-CHECK2020-03-05icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities could allow an attacker to change settings, delete the application, run remote code, cause a system crash, cause a denial-of-service condition, revert to factory settings, and overwrite MAC addresses.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdwago_psirtNVDCVE.orgMITRE
published 2019-12-18modified 2026-06-17
09

references (7)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan