CVE-2026-12569: PTC Windchill and FlexPLM Improper Input Validation Vulnerability

Q: How do I fix CVE-2026-12569?

flexplm: upgrade to newer than 11.0m030; windchill pdmlink: upgrade to 11.0m030. Exact commands for each OS are on this page.

Q: Is CVE-2026-12569 being exploited?

Yes. CVE-2026-12569 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2026-12569 affect?

CVE-2026-12569 affects flexplm, windchill pdmlink. Severity is critical (CVSS 9.8). A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill PDMlink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. * This advisory also applies to all CPS ve

Q: How urgent is CVE-2026-12569?

Priority 97/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Patch now

CRITICAL 9.8EXPLOITEDREMOTEUPGRADEUPGRADE

CVE-2026-12569 is a critical-severity flaw (CVSS 9.8) affecting flexplm, windchill pdmlink, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill PDMlink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. * This advisory also applies to all CPS versions * The identified vulnerability also impacts Windchill and FlexPLM releases prior to 11.0 M030

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Used in ransomware campaigns
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	46.0% (top 1%)
CISA exploited list	Yes, fix due 2026-06-28, used in ransomware
Weakness	CWE-20, CWE-502
Published	2026-06-18
Last modified	2026-08-01

Publisher (CNA): PTC · Vendor: ptc

Last updated 2026-08-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-18 01:18 UTCPublished CVE record published
2026-06-25Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-06-28Deadline CISA due date for US federal agencies to patch
2026-08-01 05:16 UTCUpdated Record last modified

ptc flexplm UPGRADE

Affected: <= 11.0m030 · 11.1m020 · 11.2.1.0 · 12.0.0.0 · 12.0.2.0 · 12.1.3.0 · 13.0.2.0 · 13.0.3.0

Fixed in: newer than 11.0m030

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flexplm || rpm -q flexplm || flexplm --version

2. UPGRADE to newer than 11.0m030 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flexplm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flexplm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

ptc windchill pdmlink UPGRADE

Affected: < 11.0m030 · 11.0m030 · 11.1m020 · 11.2.1.0 · 12.0.2.0 · 12.1.2.0 · 13.0.2.0 · 13.1.0.0

Fixed in: 11.0m030

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy windchill-pdmlink || rpm -q windchill-pdmlink || windchill-pdmlink --version

2. UPGRADE to 11.0m030 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade windchill-pdmlink

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade windchill-pdmlink

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · ruff · FIXED · 0.17.3-1.fc46 · FEDORA-2026-63898fdcbb · source

sudo dnf upgrade --advisory=FEDORA-2026-63898fdcbb

Fedora ELN · xorg-x11-server-Xwayland · FIXED · 26.0.99.903-2.eln159 · FEDORA-2026-4581dab0ed · source

sudo dnf upgrade --advisory=FEDORA-2026-4581dab0ed

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-12569?

flexplm: upgrade to newer than 11.0m030; windchill pdmlink: upgrade to 11.0m030. Exact commands for each OS are on this page.

Is CVE-2026-12569 being exploited?

Yes. CVE-2026-12569 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2026-12569 affect?

CVE-2026-12569 affects flexplm, windchill pdmlink. Severity is critical (CVSS 9.8). A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill PDMlink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data. * This advisory also applies to all CPS ve

How urgent is CVE-2026-12569?

Priority 97/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Used in ransomware campaigns; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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