CVE-2020-6857Public exploit

FTP password disclosure via reversible hard-coded key

Published Jan 21, 2020 · Updated Aug 4, 2024

Weak password encryption in Neowise CarbonFTP 1.4 allows local users to recover saved FTP server passwords from project files. When a project is saved, CarbonFTP writes the password into a .CFTP file as decimal values produced by adding the constant 0x97F to hex-encoded password bytes. A local user who can read a saved project file can reverse the addition to recover its FTP credentials; no integrity or service impact is established.

CVSS severity5.5
Medium
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password encryption in Neowise CarbonFTP 1.4 allows local users to recover saved FTP server passwords from project files. When a project is saved, CarbonFTP writes the password into a .CFTP file as decimal values produced by adding the constant 0x97F to hex-encoded password bytes. A local user who can read a saved project file can reverse the addition to recover its FTP credentials; no integrity or service impact is established.

The record

CVE
CVE-2020-6857
Published
Jan 21, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, CWE-798, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 21, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
CWE-798Use of Hard-coded Credentials
T1552.001Credentials In Files

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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