How severe is CVE-2025-55221?

CVE-2025-55221 has a CVSS 3.x base score of 8.6, 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-2025-55221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55221?

CVE-2025-55221 affects Socomec Diris M-70 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55221?

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.

Does CVE-2025-55221 have an EU (EUVD) identifier?

Yes. CVE-2025-55221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200036.

When was CVE-2025-55221 published?

CVE-2025-55221 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-55221

CVE-2025-55221 is a high-severity vulnerability in Socomec Diris M-70 Firmware with a CVSS 3.x base score of 8.6. 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-306.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200036
Weakness: CWE-306
Affected product: Socomec Diris M-70 Firmware
Published: 2025-12-01
Last modified: 2026-06-17

Description

A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted network packet can lead to a denial of service. An attacker can send an unauthenticated packet to trigger this vulnerability.This vulnerability is specific to the malicious message sent via Modbus TCP over port 502.

Frequently asked questions

What is CVE-2025-55221?: A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted network packet can lead to a denial of service. An attacker can send an unauthenticated packet to trigger this vulnerability.This vulnerability is specific to the malicious message sent via Modbus TCP over port 502.
How severe is CVE-2025-55221?: CVE-2025-55221 has a CVSS 3.x base score of 8.6, 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-2025-55221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55221?: CVE-2025-55221 affects Socomec Diris M-70 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55221?: 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.
Does CVE-2025-55221 have an EU (EUVD) identifier?: Yes. CVE-2025-55221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200036.
When was CVE-2025-55221 published?: CVE-2025-55221 was published on 2025-12-01 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2025-2251

Affected products (1)

cpe:2.3:o:socomec:diris_m-70_firmware:1.6.9:*:*:*:*:*:*:*

More vulnerabilities in Socomec Diris M-70 Firmware

CVE-2025-55222 — High (CVSS 8.6): A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of…
CVE-2025-26858 — High (CVSS 8.6): A buffer overflow vulnerability exists in the Modbus TCP functionality of Socomec DIRIS Digiware M-70 1.6.9. A…
CVE-2025-23417 — High (CVSS 8.6): A denial of service vulnerability exists in the Modbus RTU over TCP functionality of Socomec DIRIS Digiware M-70 1.6.9.…
CVE-2024-48882 — High (CVSS 8.6): A denial of service vulnerability exists in the Modbus TCP functionality of Socomec DIRIS Digiware M-70 1.6.9. A…
CVE-2025-54851 — High (CVSS 7.5): A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP functionality of Socomec DIRIS…
CVE-2025-54850 — High (CVSS 7.5): A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP functionality of Socomec DIRIS…

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