CVE-2020-5526Network attack vector

Sensitive-data disclosure via unverified server certificates

Published Jan 31, 2020 · Updated Aug 4, 2024

Improper certificate validation in affected AWMS Mobile App releases allows man-in-the-middle attackers to read encrypted traffic. The app accepts crafted X.509 server certificates without verifying their trust, allowing a spoofed server to terminate connections and expose sensitive information. Exploitation requires control of the network path, such as through a malicious wireless access point; the documented consequence is eavesdropping rather than service interruption.

CVSS severity5.9
Medium
EPSS probability0.50%
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 affected AWMS Mobile App releases allows man-in-the-middle attackers to read encrypted traffic. The app accepts crafted X.509 server certificates without verifying their trust, allowing a spoofed server to terminate connections and expose sensitive information. Exploitation requires control of the network path, such as through a malicious wireless access point; the documented consequence is eavesdropping rather than service interruption.

The record

CVE
CVE-2020-5526
Published
Jan 31, 2020
Updated
Aug 4, 2024
Vendor
FUJIFILM Business Innovation
Product
AWMS Mobile App
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 31, 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=for Android 2.0.0 to 2.0.5 and for iOS 2.0.0 to 2.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FUJIFILM Business Innovation · AWMS Mobile Appversion=for Android 2.0.0 to 2.0.5 and for iOS 2.0.0 to 2.0.8

Published CVSS scores

4.8JPCERT/CC and IPACVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
4.0JPCERT/CC and IPAAV:N/AC:H/Au:N/C:P/I:P/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/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.

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
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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