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CVE-2021-27102 is an operating system command execution vulnerability in Accellion File Transfer Appliance (FTA). It affects FTA version 9_12_411 and earlier and was fixed in FTA_9_12_416 and later. Available reporting describes the flaw as command execution via a local web service call and further indicates it is an OS command injection issue exploitable by an attacker with local access and low privileges. In the broader Accellion FTA intrusion activity, this vulnerability was one of four flaws leveraged against legacy FTA deployments. Successful exploitation can enable execution of attacker-controlled commands on the appliance and can contribute to follow-on actions such as deployment of malicious tooling, data access, and exfiltration.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
One of four zero-day vulnerabilities in a legacy file transfer appliance product exploited as an entry point in Clop-related attacks.
A command execution vulnerability in Accellion FTA via a local web service call.
One of several zero-day vulnerabilities in the Accellion/Kiteworks File Transfer Appliance mentioned as part of Clop's historical mass exploitation of file transfer applications.
An Accellion FTA vulnerability listed as exploited by Clop in the content, tied generally to the Accellion/Kiteworks File Transfer Appliance campaign.
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.