CVE-2025-64691: The vulnerability, if exploited, could allow an authenticated miscreant (OS standard user) to tamper with TCL

Q: How do I fix CVE-2025-64691?

process optimization: upgrade to 2025. Exact commands for each OS are on this page.

Q: Is CVE-2025-64691 being exploited?

CVE-2025-64691 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-64691 affect?

CVE-2025-64691 affects process optimization. Severity is high (CVSS 8.8). 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 serve

Routine

HIGH 8.8UPGRADE

CVE-2025-64691 is a high-severity flaw (CVSS 8.8) affecting process optimization. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-01-16
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: aveva

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-16 02:16 UTCPublished CVE record published
2026-06-17 09:55 UTCUpdated Record last modified

aveva process optimization UPGRADE

Affected: < 2025

Fixed in: 2025

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy process-optimization || rpm -q process-optimization || process-optimization --version

2. UPGRADE to 2025 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade process-optimization

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade process-optimization

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-64691?

process optimization: upgrade to 2025. Exact commands for each OS are on this page.

Is CVE-2025-64691 being exploited?

CVE-2025-64691 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-64691 affect?

CVE-2025-64691 affects process optimization. Severity is high (CVSS 8.8). 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 serve

How urgent is CVE-2025-64691?

Priority 36/100. High severity

Related CVEs

CVE-2025-65118 HIGH 8.8 UPGRADE The vulnerability, if exploited, could allow an authenticated miscreant (OS Standard User) to trick Process O
CVE-2025-65117 HIGH 7.4 UPGRADE The vulnerability, if exploited, could allow an authenticated miscreant (Process Optimization Designer User)
CVE-2025-64769 HIGH 7.1 UPGRADE The Process Optimization application suite leverages connection channels/protocols that by-default are not en
CVE-2025-64729 HIGH 8.1 UPGRADE The vulnerability, if exploited, could allow an authenticated miscreant (OS Standard User) to tamper with Pro
CVE-2025-61943 HIGH 8.4 UPGRADE The vulnerability, if exploited, could allow an authenticated miscreant (Process Optimization Standard User)

References

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