CVE-2020-21936Public exploitNetwork attack vector

Information disclosure via unauthenticated HNAP aggregation

Published Jul 21, 2021 · Updated Aug 4, 2024

Missing authentication in Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows remote attackers to read configuration data. The HNAP1/GetMultipleHNAPs handler accepts an unauthenticated JSON request naming GetStationSettings, GetWebsiteFilterSettings, and GetNetworkSettings, then returns each result without an authorization check. Network reachability of the HNAP interface is sufficient; exposed data includes client identifiers, parental-control rules, and LAN settings, with no reported write access.

CVSS severity5.3
Medium
EPSS probability1.25%
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

Missing authentication in Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows remote attackers to read configuration data. The HNAP1/GetMultipleHNAPs handler accepts an unauthenticated JSON request naming GetStationSettings, GetWebsiteFilterSettings, and GetNetworkSettings, then returns each result without an authorization check. Network reachability of the HNAP interface is sufficient; exposed data includes client identifiers, parental-control rules, and LAN settings, with no reported write access.

The record

CVE
CVE-2020-21936
Published
Jul 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2021CVE 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

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

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NVDAV:N/AC:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

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