Is CVE-2021-27103 actively exploited?

Yes. CVE-2021-27103 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-27103 be exploited remotely?

The attack vector of CVE-2021-27103 has not been classified yet.

What is the CVSS score of CVE-2021-27103?

CVE-2021-27103 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-27103

HIGHCISA KEVIN THE WILD

CVE-2021-27103

Published: November 3, 2021

EPSS:2.87%probability of exploitation in 30 daysPercentile:86.0th

Official Description

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

NVD Source

CISA KEV Advisory

Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability

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

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Accellion FTA contains a high-severity server-side request forgery (SSRF) vulnerability, exploitable via a crafted POST request to wmProgressstat.html. Its inclusion in CISA's KEV catalog and an EPSS score of 0.02866 confirm it as a known and actively exploited vulnerability. This flaw could allow an attacker to make requests from the server to other internal or external systems.

This vulnerability is actively being exploited in the wild, as confirmed by CISA's KEV catalog. Exploitation occurs via a crafted POST request to a specific HTML page.

Recommended Action

Organizations using Accellion FTA should apply all available security updates and patches. Implement network segmentation and egress filtering to limit the impact of SSRF vulnerabilities.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-27103 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-27103 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.