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CVE-2021-27103

CRITICAL
9.8
CVSS Score
Published: February 16, 2021 at 08:12 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
1 product affected across 1 vendorFta

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 11%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score11.4%

EPSS (Exploit Prediction Scoring System) estimates a 11.4% chance this CVE is exploited in the wild within the next 30 days — higher than 96% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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

Required Action
Apply updates per vendor instructions.
Ransomware Use
Known
Added to KEV
Nov 3, 2021
Remediation Due
Nov 17, 2021
1808 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-27103

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fta· Accellion
95%
v < 9_12_416
Affected range stops below 9_12_416, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCBroken LinkProduct
Source: [email protected]
https://github.com/accellion/CVEs/blob/main/CVE-2021-27103.txt
x_refsource_MISCProduct
Source: [email protected]
https://www.accellion.com/products/fta/
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27103

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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