CVE-2021-27102 is an operating system command injection vulnerability in Accellion File Transfer Appliance (FTA) versions 9_12_411 and earlier. An attacker with local access and low privileges can execute operating system commands through a local web service call. The vulnerability was used in multi-vulnerability attack chains targeting Accellion FTA. FTA_9_12_416 and later contain the fix.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This 13-file Python PoC suite is centered on CVE-2014-9222 (Misfortune Cookie) in AllegroSoft RomPager, with an interactive console in main.py and standalone modules for fingerprinting, detection, authentication bypass, and denial of service. common.py contains a per-device realm-to-cookie-offset table covering multiple Billion, D-Link, TP-Link, Zyxel, and Azmoon models. The RomPager detector sends a canary cookie to confirm request-URI corruption; auth_bypass.py uses firmware-specific magic cookies to write authentication state; dos.py sends oversized Cookie headers and polls for a watchdog reboot. The suite also includes operational exploit modules for Accellion FTA CVE-2021-27101/27102 (Host-header SQLi to recover a secret, then write/verify a PHP webshell), Huawei HG532 CVE-2017-17215 (SOAP command injection), and MikroTik WinBox CVE-2018-14847 (directory traversal file read and credential decryption). scan.py combines service probes, although its WinBox check performs an actual credential-store read rather than a purely passive fingerprint.
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.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An operating system command execution vulnerability in Accellion FTA reachable through a local web service call. Cl0p used it within a four-vulnerability chain to deploy DEWMODE for data theft.
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.
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.