Is CVE-2023-1256 actively exploited?

No active exploitation of CVE-2023-1256 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-1256 be exploited remotely?

Yes. CVE-2023-1256 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-1256?

CVE-2023-1256 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-1256

Published: March 16, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerable to an improper authorization exploit which could allow an unauthenticated user to remotely read data, cause denial of service, and tamper with alarm states.

NVD Source

Technical Analysis

CVE-2023-1256 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.