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High

Authenticated denial of service in AVEVA PI Data Archive subsystems

IdentifiersCVE-2025-36539CWE-248· Uncaught Exception

CVE-2025-36539 is an uncaught exception vulnerability affecting AVEVA PI Data Archive components used with Rockwell Automation FactoryTalk Historian Site Edition, including FactoryTalk Historian SE versions 11.00 and earlier. The flaw allows an authenticated user to trigger an unhandled exception that can shut down necessary PI Data Archive subsystems. The issue is described as residing in AVEVA PI Data Archive products and results in instability or crash conditions within required historian subsystems rather than direct code execution.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause denial of service by shutting down necessary PI Data Archive subsystems. The supporting content also indicates that, depending on the timing of the crash, data present in snapshots or the write cache may be lost. This can interrupt historian availability and impair collection or retention of process data.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrading is not possible, restrict access to PI Data Archive services, specifically limiting exposure of PI Data Archive port 5450 to trusted hosts and networks only. Apply standard ICS hardening measures noted in the advisory context: minimize network exposure, ensure the system is not internet-accessible, segment control networks from business networks, place affected systems behind firewalls, use secure remote access such as updated VPNs, and monitor PI Data Archive subsystems for unexpected restarts or shutdowns.

Remediation

Patch, then assume compromise.

Rockwell Automation states that the FactoryTalk Historian vulnerabilities, including CVE-2025-36539, were fixed in FactoryTalk Historian Site Edition version 12.00.00. Upgrade affected deployments from version 11.00 and earlier to version 12.00.00 or later.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Rockwell AutomationFactorytalk Historian Seapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2025-36539
NVD
nvd.nist.gov/vuln/detail/CVE-2025-36539
MITRE CWE · CWE-248
Uncaught Exception
aveva.com
aveva.com/en/support-and-success/cyber-security-updates
cisa.gov
cisa.gov/news-events/ics-advisories/icsa-25-162-07