THREATPORT/VULNERABILITY/CVE-2010-20121
CRITICAL SEVERITY

CVE-2010-20121

Easyftp Server vulnerability

CVSS
9.8
EPSS
3.2%
EPSS pct
87th
Exploited
No known
EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”
Affected vendor
Easyftp Server Project
Affected product
Easyftp Server
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-121 — Stack-based Buffer Overflow
Published
2025-08-21

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2010-20121

  • Confirm whether Easyftp Server Project Easyftp Server is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2010-20121.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2010-20121

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2010-20121 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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