CVE-2021-43774Public exploitNetwork attack vector

Credential disclosure via reversible address-book password encoding

Published Mar 3, 2022 · Updated Aug 4, 2024

Weak cryptography in Fujifilm DocuCentre-VI C4471 1.8 allows remote authenticated users to recover stored service passwords. The address-book export writes Base64-like MFPASSWD values whose characters use a reversible plus-or-minus-13 substitution. Administrative web access and use of the address-book export are required; recovered domain, FTP, or SMB credentials expose external services.

CVSS severity4.9
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak cryptography in Fujifilm DocuCentre-VI C4471 1.8 allows remote authenticated users to recover stored service passwords. The address-book export writes Base64-like MFPASSWD values whose characters use a reversible plus-or-minus-13 substitution. Administrative web access and use of the address-book export are required; recovered domain, FTP, or SMB credentials expose external services.

The record

CVE
CVE-2021-43774
Published
Mar 3, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, T1552.001, T1140
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 3, 2022CVE 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 vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.9NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
3.5NIST National Vulnerability DatabaseAV:N/AC:M/Au:S/C:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1552.001Credentials In Files
T1140Deobfuscate/Decode Files or Information

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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