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CVE-2025-64691

27
FAUCET Score

CVE-2025-64691 is a critical vulnerability affecting Aveva Process Optimization that allows an authenticated standard user to tamper with TCL Macro scripts. This could lead to privilege escalation to OS system, potentially resulting in a complete compromise of the model application server. With a CVSS score of 8.8 (HIGH), the vulnerability has a local attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 2024.1CPE match
cpe:2.3:a:aveva:process_optimization:*:*:*:*:*:*:*:*
< 2025CPE matchmatch criteria
cpe:2.3:a:aveva:process_optimization:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
HIGH
SS Integrity
HIGH
SS Availability
HIGH
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 58th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-015-01.json
Third Party Advisory
softwaresupportsp.aveva.com / en-US/downloads/products/details/a643eaa3-0d85-4fde-ac11-5239e87a68ea
Permissions Required
aveva.com / en/support-and-success/cyber-security-updates
Vendor Advisory
cisa.gov / news-events/ics-advisories/icsa-26-015-01
Third Party AdvisoryUS Government Resource