CVE-2020-5520Network attack vector

Traffic interception via unverified server certificates

Published Jan 27, 2020 · Updated Aug 4, 2024

Improper certificate validation in FUJIFILM Business Innovation netprint 3.2.3 and earlier allows man-in-the-middle attackers to intercept traffic. The app's HTTPS client accepts a crafted server certificate instead of validating the server's X.509 identity. Exploitation requires the app to use an attacker-controlled network, where the attacker can read or modify communications.

CVSS severity4.8
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in FUJIFILM Business Innovation netprint 3.2.3 and earlier allows man-in-the-middle attackers to intercept traffic. The app's HTTPS client accepts a crafted server certificate instead of validating the server's X.509 identity. Exploitation requires the app to use an attacker-controlled network, where the attacker can read or modify communications.

The record

CVE
CVE-2020-5520
Published
Jan 27, 2020
Updated
Aug 4, 2024
Vendor
FUJIFILM Business Innovation Corp.
Product
netprint
Classifications
CWE-295, CAPEC-459, CAPEC-475, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.2.3 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FUJIFILM Business Innovation Corp. · netprintversion=3.2.3 and earlier

Published CVSS scores

4.0JPCERT/CCAV:N/AC:H/Au:N/C:P/I:P/A:N
7.4NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.8JPCERT/CCCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CAPEC-459Creating a Rogue Certification Authority Certificate
CAPEC-475Signature Spoofing by Improper Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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