CVE-2021-3898Network attack vector

Channel interception via improper certificate validation

Published Apr 22, 2022 · Updated Aug 3, 2024

Improper certificate validation in Motorola Ready For and Device Help before 2021-04-08 allows man-in-the-middle attackers to access communications. The applications accept a server certificate without properly authenticating it, but Motorola has not disclosed the affected code path or exact validation error. Exploitation requires user interaction and an attacker able to present a crafted certificate, exposing channel confidentiality and integrity.

CVSS severity6.8
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper certificate validation in Motorola Ready For and Device Help before 2021-04-08 allows man-in-the-middle attackers to access communications. The applications accept a server certificate without properly authenticating it, but Motorola has not disclosed the affected code path or exact validation error. Exploitation requires user interaction and an attacker able to present a crafted certificate, exposing channel confidentiality and integrity.

The record

CVE
CVE-2021-3898
Published
Apr 22, 2022
Updated
Aug 3, 2024
Vendor
Motorola Mobility
Product
Device Help
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=various

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Motorola Mobility · Device Helpversion=various
Motorola Mobility · Ready Forversion=various

Published CVSS scores

6.8Lenovo Group Ltd.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo