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CVE-2026-4681 is a critical remote code execution vulnerability affecting PTC Windchill PDMLink and PTC FlexPLM. The flaw is described as arising from deserialization of untrusted data and has also been classified by the vendor and CISA as a code injection issue. Successful exploitation can allow arbitrary code execution on the affected application server. Public reporting and vendor guidance indicate exploitation activity would involve specially crafted requests reaching vulnerable Windchill gateway or JSP handling paths, after which an attacker may stage server-side components to execute commands or read files. Affected versions include 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, and 13.1.3.0, and 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, and 13.0.3.0.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
42 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An earlier critical remote code execution vulnerability affecting the same PTC Windchill and FlexPLM products, mentioned for comparison/background; the content states there is no known exploitation.
A previously mentioned critical vulnerability affecting the same PTC Windchill product family, referenced only as background context.
A similar critical Windchill and FlexPLM vulnerability mentioned only as background comparison to the main flaw.
A code injection vulnerability in PTC Windchill and FlexPLM that also allowed remote code execution; the article references possible in-the-wild exploitation based on indicators of compromise, but notes exploitation was not confirmed in the advisory.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.