How severe is CVE-2025-64691?

CVE-2025-64691 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64691?

CVE-2025-64691 affects Aveva Process Optimization. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64691?

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-2025-64691 have an EU (EUVD) identifier?

Yes. CVE-2025-64691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2994.

When was CVE-2025-64691 published?

CVE-2025-64691 was published on 2026-01-16 and last updated on 2026-06-17.

CVE-2025-64691

CVE-2025-64691 is a high-severity vulnerability in Aveva Process Optimization with a CVSS 3.x base score of 8.8. 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2994
Weakness: CWE-94
Affected product: Aveva Process Optimization
Published: 2026-01-16
Last modified: 2026-06-17

Description

The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL Macro scripts and escalate privileges to OS system, potentially resulting in complete compromise of the model application server.

Frequently asked questions

What is CVE-2025-64691?: The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL Macro scripts and escalate privileges to OS system, potentially resulting in complete compromise of the model application server.
How severe is CVE-2025-64691?: CVE-2025-64691 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64691?: CVE-2025-64691 affects Aveva Process Optimization. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64691?: 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-2025-64691 have an EU (EUVD) identifier?: Yes. CVE-2025-64691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2994.
When was CVE-2025-64691 published?: CVE-2025-64691 was published on 2026-01-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aveva:process_optimization:*:*:*:*:*:*:*:*

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