What’s Vulnerable › Vulnerabilities

CVE-2023-1256: CVE-2023-1256

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-16 · updated 2026-06-17

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.

Affected products

• AVEVA Plant SCADA: 2020r2, 2020r2-update_10, 2023, 2023-update_10
• AVEVA Telemetry Server: 2020r2, 2020r2-sp1

References

• https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04

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