CVE-2026-77644: ptc windchill risk and reliability enterprise edition (formerly relex)
CVSS: 9.3v4.0CriticalDeferred
Published 20-08-2026Last modified 26-08-2026
Vulnerability summary
CVE-2026-77644 is a critical (CVSS 9.3) vulnerability in ptc windchill risk and reliability enterprise edition (formerly relex). EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.2% of scored vulnerabilities.
CVSS score
9.3/10
010
Critical · v4.0 (CVE.org)EPSS score
0.43%
0%100%
Low · +0.12 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 20-08-2026PublishedVulnerability first disclosed.
- 26-08-2026Last modifiedVulnerability information updated.
Description
A critical bypass access control vulnerability has been reported in PTC Windchill Risk and Reliability (WRR) Enterprise Edition.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.3Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/RE:M/U:RedSourcesAll 2 agree
- NVDNIST9.3CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:M/U:Red
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
+0.12 pp
From 0.31% on 22-09-2026
22-09-202622-10-2026
EPSS score0.43%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
- CWE-620Unverified Password ChangeWhen setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.
Affected systems
Ptc1 product
1 vendor · 1 product