How severe is CVE-2022-34759?

CVE-2022-34759 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-34759 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-34759?

CVE-2022-34759 primarily affects Schneider-electric Opc Ua Module For M580 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-34759?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-34759 published?

CVE-2022-34759 was published on 2022-07-13 and last updated on 2026-06-17.

CVE-2022-34759

CVE-2022-34759 is a high-severity vulnerability in Schneider-electric Opc Ua Module For M580 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Schneider-electric Opc Ua Module For M580 Firmware
Published: 2022-07-13
Last modified: 2026-06-17

Description

A CWE-787: Out-of-bounds Write vulnerability exists that could cause a denial of service of the webserver due to improper parsing of the HTTP Headers. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V1.0), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)

Frequently asked questions

What is CVE-2022-34759?: A CWE-787: Out-of-bounds Write vulnerability exists that could cause a denial of service of the webserver due to improper parsing of the HTTP Headers. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V1.0), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)
How severe is CVE-2022-34759?: CVE-2022-34759 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-34759 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-34759?: CVE-2022-34759 primarily affects Schneider-electric Opc Ua Module For M580 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-34759?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-34759 published?: CVE-2022-34759 was published on 2022-07-13 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-193-01_OPC_UA_X80_Advanced_RTU_Modicon_Communication_Modules+_Security_Notification.pdf

Affected products (2)

cpe:2.3:o:schneider-electric:opc_ua_module_for_m580_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:x80_advanced_rtu_module_firmware:1.0:*:*:*:*:*:*:*

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