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PatchSiren cyber security CVE debrief

CVE-2026-77646 PTC CVE debrief

A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data, potentially allowing attackers to make unauthorized requests. Organizations should verify their installations and mitigate potential risks. This CVE record was published on 2026-08-20T22:18:06.657Z and has not been modified since then. The NVD entry is currently marked as Received. Further verification and review are necessary to understand the full impact and to implement appropriate mitigations.

Vendor
PTC
Product
Windchill PDMLink
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-20
Original CVE updated
2026-09-09
Advisory published
2026-08-20
Advisory updated
2026-09-09

Who should care

Organizations using PTC Windchill PDMLink and PTC FlexPLM should be aware of this SSRF vulnerability and take steps to verify their installations and mitigate potential risks. This includes reviewing deserialization processes, implementing compensating controls, and monitoring for potential exploitation attempts. IT and security teams responsible for these systems should prioritize verification and mitigation efforts.

Technical summary

A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data, potentially allowing attackers to make unauthorized requests. This could lead to unauthorized access or data breaches if not properly mitigated. Organizations should prioritize verification of their inventory and review for potential SSRF vulnerabilities.

Defensive priority

Organizations using PTC Windchill PDMLink and PTC FlexPLM should prioritize verification of their inventory and review for potential SSRF vulnerabilities.

Recommended defensive actions

  • Verify inventory of PTC Windchill PDMLink and PTC FlexPLM installations
  • Review deserialization processes for untrusted data
  • Implement compensating controls for SSRF vulnerabilities
  • Monitor for potential exploitation attempts
  • Review official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

Evidence is limited; primary official records indicate a Server-Side Request Forgery (SSRF) vulnerability in PTC Windchill PDMLink and PTC FlexPLM, potentially exploitable through deserialization of untrusted data. Further verification is necessary. Organizations should review the official CVE record and NVD details for additional information. Defensive measures should include verifying inventory, reviewing deserialization processes, and implementing compensating controls.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-77646 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-77646

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-77646 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-77646

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.ptc.com/en/support/article/CS474826

    0b655efc-079c-4cb9-9e8d-164871239f4e

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.