CVE-2020-21934Public exploitNetwork attack vector

Unauthenticated syslog disclosure via unprotected download handler

Published Jul 21, 2021 · Updated Aug 4, 2024

Authentication bypass in Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows remote attackers to download the syslog archive. The prog.fcgi handler accepts an empty POST naming /HNAP1/GetDownLoadSyslog with a partially authorized uid cookie and returns the archive without full authentication. Network access to the management interface is sufficient; the demonstrated consequence is disclosure of data contained in the syslog archive.

CVSS severity7.5
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Motorola CX2 router CX 1.0.2 Build 20190508 Rel.97360n allows remote attackers to download the syslog archive. The prog.fcgi handler accepts an empty POST naming /HNAP1/GetDownLoadSyslog with a partially authorized uid cookie and returns the archive without full authentication. Network access to the management interface is sufficient; the demonstrated consequence is disclosure of data contained in the syslog archive.

The record

CVE
CVE-2020-21934
Published
Jul 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306
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

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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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/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.

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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

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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