CVE-2026-77646Network attack vector

Unauthenticated SSRF via unsafe deserialization

Published Aug 20, 2026 · Updated Aug 20, 2026

Server-side request forgery in PTC Windchill PDMLink and FlexPLM allows remote attackers to trigger server-side requests via unsafe deserialization. PTC has disclosed only that untrusted serialized data is deserialized in a way that can steer outbound requests; the affected endpoint or class has not been identified publicly. The published CVSS v4.0 vector is network-reachable and unauthenticated, and the disclosed impact is confined to downstream systems the application can reach rather than direct code execution on the PLM server.

CVSS severity7.7
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in PTC Windchill PDMLink and FlexPLM allows remote attackers to trigger server-side requests via unsafe deserialization. PTC has disclosed only that untrusted serialized data is deserialized in a way that can steer outbound requests; the affected endpoint or class has not been identified publicly. The published CVSS v4.0 vector is network-reachable and unauthenticated, and the disclosed impact is confined to downstream systems the application can reach rather than direct code execution on the PLM server.

The record

CVE
CVE-2026-77646
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Kepware
Product
Windchill PDMLink
Classifications
CWE-918, CWE-502, CAPEC-586, CAPEC-664, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

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.

  1. Affected versionversion=11.0 M030
  2. Affected versionversion=11.1 M020
  3. Affected versionversion=11.2.1.0
  4. Affected versionversion=12.0.2.0
  5. Affected versionversion=12.1.2.0
  6. Affected versionversion=13.0.2.0
  7. Affected versionversion=13.1.0.0
  8. Affected versionversion=13.1.1.0
  9. Affected versionversion=13.1.2.0
  10. Affected versionversion=13.1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kepware · Windchill PDMLinkversion=11.0 M030; version=11.1 M020; version=11.2.1.0; version=12.0.2.0; version=12.1.2.0; version=13.0.2.0; version=13.1.0.0; version=13.1.1.0; version=13.1.2.0; version=13.1.3.0
Kepware · FlexPLMversion=11.0 M030; version=11.1 M020; version=11.2.1.0; version=12.0.0.0; version=12.0.2.0; version=12.0.3.0; version=12.1.2.0; version=12.1.3.0; version=13.0.2.0; version=13.0.3.0

Published CVSS scores

7.7PTCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

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.

Technologies

Your stack

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Your stack

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