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CVE-2021-27103 — Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability

Actively-exploited vulnerability intelligence · Sentinel APEX™ live threat feed

HIGH severity🔴 Actively Exploited · CISA KEV

🔴 CVE-2021-27103 is being actively exploited in the wild. Check if your infrastructure is exposed: ⚡ Free Exposure Scan

Overview

Accellion FTA contains a server-side request forgery (SSRF) vulnerability exploited via a crafted POST request to wmProgressstat.html.

Vulnerability details

CVE ID: CVE-2021-27103
Vulnerability: Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability
Vendor: Accellion
Affected products: Accellion: FTA
Severity: HIGH
Exploitation status: Actively exploited in the wild (CISA KEV)
Published: 2021-11-03

Remediation guidance

CVE-2021-27103 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.

Apply the vendor's official security update for Accellion the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.

Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.

Authoritative references

Remediate CVE-2021-27103 — and stay ahead of the next one

CVE-2021-27103 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2021-27103 and other Accellion issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.

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