How severe is CVE-2025-26858?

CVE-2025-26858 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-2025-26858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26858?

CVE-2025-26858 affects Socomec Diris M-70 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-26858?

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-2025-26858 have an EU (EUVD) identifier?

Yes. CVE-2025-26858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200030.

When was CVE-2025-26858 published?

CVE-2025-26858 was published on 2025-12-01 and last updated on 2026-06-17.

CVE-2025-26858

CVE-2025-26858 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-20.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200030
Weakness: CWE-20
Affected product: Socomec Diris M-70 Firmware
Published: 2025-12-01
Last modified: 2026-06-17

Description

A buffer overflow vulnerability exists in the Modbus TCP functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted set of network packets can lead to denial of service. An attacker can send a sequence of unauthenticated packets to trigger this vulnerability.

Frequently asked questions

What is CVE-2025-26858?: A buffer overflow vulnerability exists in the Modbus TCP functionality of Socomec DIRIS Digiware M-70 1.6.9. A specially crafted set of network packets can lead to denial of service. An attacker can send a sequence of unauthenticated packets to trigger this vulnerability.
How severe is CVE-2025-26858?: CVE-2025-26858 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-2025-26858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26858?: CVE-2025-26858 affects Socomec Diris M-70 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-26858?: 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-2025-26858 have an EU (EUVD) identifier?: Yes. CVE-2025-26858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200030.
When was CVE-2025-26858 published?: CVE-2025-26858 was published on 2025-12-01 and last updated on 2026-06-17.

References

Affected products (1)

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

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