CVE-2021-27101 Accellion CVE debrief

Who should care

Security and IT teams responsible for Accellion FTA, vulnerability management, incident response, and any environment exposed to external file-transfer services. Organizations with third-party dependencies on Accellion FTA should also verify remediation status and exposure.

Technical summary

The supplied official records identify CVE-2021-27101 as an SQL injection issue in Accellion FTA. CISA added the CVE to the Known Exploited Vulnerabilities catalog on 2021-11-03 and marked known ransomware campaign use as present. The KEV entry’s required action is to apply updates per vendor instructions. No further technical specifics were included in the supplied corpus.

Defensive priority

Critical. CISA has designated this as a known exploited vulnerability with ransomware campaign association, and the KEV due date was 2021-11-17.

Recommended defensive actions

• Verify whether any Accellion FTA instances are present in the environment, including legacy or externally managed deployments.
• Apply vendor-recommended updates or mitigations immediately, following the CISA KEV required action guidance.
• If exposure existed after public disclosure, review logs, access paths, and downstream data handling for signs of misuse.
• Prioritize remediation before or ahead of the KEV due date when using historical timelines for risk management.
• Track any third-party services or partners that may still rely on Accellion FTA and confirm their remediation status.

Evidence notes

CISA’s Known Exploited Vulnerabilities JSON entry for CVE-2021-27101 lists vendorProject Accellion, product FTA, vulnerabilityName "Accellion FTA SQL Injection Vulnerability," dateAdded 2021-11-03, dueDate 2021-11-17, knownRansomwareCampaignUse "Known," and requiredAction "Apply updates per vendor instructions." The source corpus also provides official CVE and NVD record links for the identifier.

Official resources