What is the CVSS score of CVE-2025-26858?

CVE-2025-26858 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Diris M 70 Firmware are affected by CVE-2025-26858?

A high-severity vulnerability in Socomec DIRIS Digiware M-70 devices allows unauthenticated attackers to cause service disruptions through specially crafted network packets.

How to fix or mitigate CVE-2025-26858?

Within 24 hours: Inventory all Socomec DIRIS Digiware M-70 devices running version 1.6.9 and isolate affected units from untrusted network segments. Within 7 days: Implement network segmentation and access controls to restrict Modbus TCP traffic to authorized sources only; document current mitigation status for audit purposes. Within 30 days: Monitor Socomec security advisories for patch availability; evaluate firmware upgrade timelines; conduct risk assessment to determine if device replacement is necessary if patching timeline exceeds acceptable risk tolerance.

Diris M 70 Firmware CVE-2025-26858

EUVD-2025-200030 HIGH

Improper Input Validation (CWE-20)

2025-12-01 talos-cna@cisco.com

Denial Of Service Buffer Overflow Diris M 70 Firmware

8.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-200030

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

CVE Published

Dec 01, 2025 - 16:15 nvd

HIGH 8.6

DescriptionCVE.org

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.

Analysis

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Improper Input Validation (CWE-20).