Unauthenticated code execution via servlet deserialization
Published Jun 18, 2026 · Updated Jun 18, 2026
Deserialization of untrusted data in PTC Windchill PDMLink and FlexPLM allows remote attackers to execute arbitrary code without authentication. Network-exposed WindchillGW and WindchillAuthGW servlets deserialize attacker-controlled data without validating it first. No account or user interaction is required; successful exploitation runs code on the application server and has deployed persistent JSP webshells.
Summary
What happened
Deserialization of untrusted data in PTC Windchill PDMLink and FlexPLM allows remote attackers to execute arbitrary code without authentication. Network-exposed WindchillGW and WindchillAuthGW servlets deserialize attacker-controlled data without validating it first. No account or user interaction is required; successful exploitation runs code on the application server and has deployed persistent JSP webshells.
The record
- CVE
- CVE-2026-12569
- Published
- Jun 18, 2026
- Updated
- Jun 18, 2026
- Vendor
- Kepware
- Product
- Windchill PDMLink
- Classifications
- CWE-502, CWE-20, CAPEC-153, CAPEC-586, T1505.003, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 18, 2026Exploitation reportedPersistent JSP webshell deployment
- Jun 18, 2026CVE publishedPublication date reported by the CVE source.
- Jun 18, 2026Record updatedLatest update available in the CVE record.
- Jun 25, 2026Exploitation reportedCISA Known Exploited Vulnerabilities entry
- Jul 27, 2026Exploitation reportedHazy Scorpius exploitation activity
- Jul 27, 2026Exploitation reportedCl0p data-theft and extortion campaign
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=11.0 M030
- Affected versionversion=11.1 M020
- Affected versionversion=11.2.1.0
- Affected versionversion=12.0.2.0
- Affected versionversion=12.1.2.0
- Affected versionversion=13.0.2.0
- Affected versionversion=13.1.0.0
- Affected versionversion=13.1.1.0
- Affected versionversion=13.1.2.0
- Affected versionversion=13.1.3.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Persistent JSP webshell deploymentreported exploitation
- Hazy Scorpius exploitation activitythreat actor
- CISA Known Exploited Vulnerabilities entryknown exploited catalog
- Cl0p data-theft and extortion campaignransomware
Technologies
Your stack
See the directory against your own environment.
Your stack
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