CVE-2025-64691: AVEVA Process Optimization · Code Injection
Affects AVEVA Process OptimizationSource CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 16 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| AVEVAProcess Optimization | Affected
| Fixed in– |
AI-suggested
1. Restrict access to AVEVA Process Optimization systems strictly to authorized personnel with a need-to-know basis, minimizing the number of users with standard OS-level privileges. 2. Implement robust authentication mechanisms, including multi-factor authentication, to reduce the risk of credential compromise. 3. Monitor and audit TCL Macro script files for unauthorized changes or tampering, employing file integrity monitoring solutions tailored to these scripts. 4. Apply network segmentation to isolate the model application servers from less trusted network zones, limiting lateral movement opportunities. 5. Employ application whitelisting to prevent unauthorized execution or modification of TCL scripts. 6. Regularly review and harden operating system security configurations on servers hosting AVEVA Process Optimization. 7. Engage with AVEVA for timely updates and patches; until patches are available, consider temporary disabling or restricting TCL Macro functionality if feasible. 8. Conduct user training to raise awareness about the risks of privilege escalation and the importance of safeguarding credentials. 9. Prepare incident response plans specifically addressing potential exploitation scenarios involving AVEVA Process Optimization. 10. Utilize endpoint detection and response (EDR) tools to detect anomalous behaviors indicative of privilege escalation or script tampering.
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.
References
- aveva.com/en/support-and-success/cyber-security-updates/ (opens in a new tab)
- softwaresupportsp.aveva.com/en-US/downloads/products/details/a643eaa3-0d85-4fde-ac11-5239e87a68ea (opens in a new tab)
- cisa.gov/news-events/ics-advisories/icsa-26-015-01 (opens in a new tab)
- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-01.json (opens in a new tab)