CVE-2026-4681
A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. This issue affects Windchill PDMLink: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.2.0, 12.1.2.0, 13.0.2.0, 13.1.0.0, 13.1.1.0, 13.1.2.0, 13.1.3.0; FlexPLM: 11.0 M030, 11.1 M020, 11.2.1.0, 12.0.0.0, 12.0.2.0, 12.0.3.0, 12.1.2.0, 12.1.3.0, 13.0.2.0, 13.0.3.0.
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exploitation prediction scoring system. probability this vulnerability will be exploited in the wild in the next 30 days.
cvss
common vulnerability scoring system v3.1. measures intrinsic severity on a 0-10 scale.
epss
0.0050
kev
no
cisa known exploited vulnerabilities catalog. confirmed active exploitation.
CVSS 4.0
Common Vulnerability Scoring System v4.0
9.3
/ 10
CRITICAL
exploitability
Attack Vector
Network
Attack Vector (AV:N): exploitable remotely over the network — most dangerous. no physical or adjacent access needed.
Attack Complexity
Low
Attack Complexity (AC:L): no special conditions needed. attack can be reliably reproduced.
Attack Requirements
None
Attack Requirements (AT:N): no special deployment or execution conditions needed.
Privileges Required
None
Privileges Required (PR:N): no authentication needed. any anonymous attacker can exploit this.
User Interaction
None
User Interaction (UI:N): no victim action needed. fully exploitable without user interaction.
vulnerable system impact
Vuln Confidentiality
High
Confidentiality (VC:H): total information disclosure. attacker gains access to all data within the component.
Vuln Integrity
High
Integrity (VI:H): complete data modification possible. attacker can modify any data.
Vuln Availability
High
Availability (VA:H): total denial of service. attacker can fully shut down the resource.
subsequent system impact
Sub Confidentiality
Low
Subsequent Confidentiality: impact on data confidentiality of downstream/connected systems. Value: L (Low)
Sub Integrity
Low
Subsequent Integrity: impact on data integrity of downstream/connected systems. Value: L (Low)
Sub Availability
Low
Subsequent Availability: impact on service availability of downstream/connected systems. Value: L (Low)
supplemental
automatable: yes
Automatable: can this be exploited at scale through automation?
supplemental
recovery: user
Recovery: how easily can the system recover? Automatic = self-healing. User = manual intervention. Irrecoverable = permanent.
supplemental
value density: concentrated
Value Density: are targets concentrated (database server) or diffuse (end-user devices)?
supplemental
provider urgency: medium
Provider Urgency: how urgently does the vendor recommend patching?
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/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:Y/R:U/V:C/RE:M/U:Red
activity density
rdintel assessment
composite score from 15+ signals including exploitation status, epss probability, detection coverage, and community attention. 0-100 scale.
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