CVE-2021-34581 - Vulnerability Details - OpenCVE

Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.01583.

Key SSVC decision points have not yet been added.

Vendors	Products
Wago	750-831 750-831\/000-002 750-831\/000-002 Firmware 750-831 Firmware 750-880 750-880\/025-000 750-880\/025-000 Firmware 750-880\/025-001 750-880\/025-001 Firmware 750-880\/025-002 750-880\/025-002 Firmware 750-880\/040-000 750-880\/040-000 Firmware 750-880 Firmware 750-881 750-881 Firmware 750-889 750-889 Firmware

Configuration 1 [-]

AND

cpe:2.3:o:wago:750-880\/040-000_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-880\/040-000:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:wago:750-880\/025-002_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-880\/025-002:-:*:*:*:*:*:*:*

Configuration 3 [-]

AND

cpe:2.3:o:wago:750-880\/025-001_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-880\/025-001:-:*:*:*:*:*:*:*

Configuration 4 [-]

AND

cpe:2.3:o:wago:750-880\/025-000_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-880\/025-000:-:*:*:*:*:*:*:*

Configuration 5 [-]

AND

cpe:2.3:o:wago:750-831\/000-002_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-831\/000-002:-:*:*:*:*:*:*:*

Configuration 6 [-]

AND

cpe:2.3:o:wago:750-889_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-889:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND

cpe:2.3:o:wago:750-881_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-881:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND

cpe:2.3:o:wago:750-831_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-831:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND

cpe:2.3:o:wago:750-880_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:wago:750-880:-:*:*:*:*:*:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-21231	Missing Release of Resource after Effective Lifetime vulnerability in OpenSSL implementation of WAGO 750-831/xxx-xxx, 750-880/xxx-xxx, 750-881, 750-889 in versions FW4 up to FW15 allows an unauthenticated attacker to cause DoS on the device.

Fixes

Solution

Update the device to the latest FW version ( >FW15 ).

Workaround

Restrict network access to the device. Do not directly connect the device to the internet Disable unused TCP/UDP-ports Disable Web Based Management ports 80/443 after configuration phase.

References

Link	Providers
https://cert.vde.com/en-us/advisories/vde-2021-038

History

Sat, 12 Jul 2025 13:45:00 +0000

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.0121}`	epss `{'score': 0.01583}`

MITRE

Status: PUBLISHED

Assigner: CERTVDE

Published: 2021-08-31T10:33:02.999010Z

Updated: 2024-09-17T00:42:35.318Z

Reserved: 2021-06-10T00:00:00

Link: CVE-2021-34581

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-08-31T11:15:07.830

Modified: 2024-11-21T06:10:44.833

Link: CVE-2021-34581

Redhat

No data.

OpenCVE Enrichment

No data.

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