Is CVE-2021-34567 actively exploited?

No active exploitation of CVE-2021-34567 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-34567 be exploited remotely?

Yes. CVE-2021-34567 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-34567?

CVE-2021-34567 has a CVSS score of 8.2 (HIGH).

HOME VULNERABILITIESCVE-2021-34567

HIGH

CVE-2021-34567

CWE-125Published: November 9, 2022· Updated: Jun 17, 2026

8.2

CVSS v3.1

Official Description

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service and an limited out-of-bounds read.

NVD Source

Technical Analysis

CVE-2021-34567 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 8.2.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

wago98 product(s)

750-8100 firmware750-8100750-8101 firmware750-8101750-8101\/025-000 firmware750-8101\/025-000750-8102 firmware750-8102750-8102\/025-000 firmware750-8102\/025-000750-8202 firmware750-8202+86

Source: NVD CPE · 147 total CPE entries