CVE-2021-27103

CRITICALNVD 9.89.8—Trending — 4 sources updated this weekExploited in the wild

9.8

Accellion FTA 9_12_411 and earlier is affected by SSRF via a crafted POST request to wmProgressstat.html. The fixed version is FTA_9_12_416 and later.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 78.4%
KEV: ⚠ Exploited

Published

February 16, 2021

Last Modified

November 3, 2025

Advisory Details (1)

Auto-updated Jun 1, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27103

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 04:08 UTCEG score recompute
2026-06-04 04:08 UTCGHSA enrichment
2026-06-04 00:21 UTCEG score recompute
2026-06-04 00:21 UTCGHSA enrichment
2026-06-03 20:34 UTCEG score recompute
2026-06-03 20:34 UTCGHSA enrichment
2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 16:47 UTCEG score recompute
2026-06-03 16:47 UTCGHSA enrichment
2026-06-03 12:59 UTCEG score recompute
2026-06-03 12:59 UTCGHSA enrichment
2026-06-03 09:12 UTCEG score recompute
2026-06-03 09:12 UTCGHSA enrichment
2026-06-03 05:25 UTCEG score recompute
2026-06-03 05:25 UTCGHSA enrichment
2026-06-03 01:38 UTCEG score recompute
2026-06-03 01:38 UTCGHSA enrichment
2026-06-02 21:51 UTCEG score recompute
2026-06-02 21:51 UTCGHSA enrichment
2026-06-02 20:11 UTCepss_batch

Frequently asked(6)

What is CVE-2021-27103?

CVE-2021-27103 is a critical vulnerability published on February 16, 2021. Accellion FTA 912411 and earlier is affected by SSRF via a crafted POST request to wmProgressstat.html. The fixed version is FTA912_416 and later.

When was CVE-2021-27103 disclosed?

CVE-2021-27103 was first published in the National Vulnerability Database on February 16, 2021, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27103 actively exploited?

Yes. CISA added CVE-2021-27103 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Accellion FTA. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

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

CVE-2021-27103 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2021-27103?

CVE-2021-27103 affects Accellion FTA. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-27103?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27103, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-27103

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Known Exploited Vulnerabilities Catalog | CISA

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-27103?

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Frequently asked(6)

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