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CVE-2021-27101

72
FAUCET Score

CVE-2021-27101 is a critical SQL injection vulnerability affecting Accellion FTA versions 9_12_370 and earlier, allowing attackers to manipulate database queries via a crafted Host header. With a CVSS score of 9.8, it presents a severe risk due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, notably by the Clop ransomware gang, and has garnered significant community attention and media coverage, despite a lack of public exploit code on platforms like Metasploit or ExploitDB. Organizations using affected versions are urged to upgrade to FTA_9_12_380 or later immediately.

Impacted Technologies

VendorProductVersion(s)CPE
<= 9_12_370CPE matchmatch criteria
cpe:2.3:a:accellion:fta:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.00%
Probability of exploitation in next 30 days
EPSS Percentile
92.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 3, 2021
This CVE's current EPSS score of 0.0600 is in the 87th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
github.com / accellion/CVEs/blob/main/CVE-2021-27101.txt
Broken LinkThird Party Advisory
accellion.com / products/fta
ProductVendor Advisory