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Vulnerabilities

Vulnerability · CVE-2021-46442

D-Link DIR-825 R1 Devices Improper Authentication

Published Nov 14, 2023 · catalog updated Nov 14, 2023 · D-Link DIR-825 R1 Devices

Patch now

CVE-2021-46442 is in the CISA known-exploited catalog. Confirm D-Link DIR-825 R1 Devices against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
56.06%
Remediation
Remediation guidance
Affected products
vendor D-Link DIR-825 R1 Devices

In the "webupg" binary of D-Link DIR-825 G1, attackers can bypass authentication through parameters "autoupgrade.asp", and perform functions such as downloading configuration files and updating firmware without authorization.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor D-Link DIR-825 R1 Devicesversion unspecified

How to fix CVE-2021-46442

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-46442 is in the CISA known-exploited catalog. Confirm D-Link DIR-825 R1 Devices against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 56.06%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 14, 2023 · VulnCheck KEV

    Detected

    In the "webupg" binary of D-Link DIR-825 G1, attackers can bypass authentication through parameters "autoupgrade.asp", and perform functions such as downloading configuration files and updating firmware without authorization.

  2. Nov 14, 2023 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2021-46442

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-46442

    30-day exploitation probability 56.1%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2021-46442

    In the "webupg" binary of D-Link DIR-825 G1, attackers can bypass authentication through parameters "autoupgrade.asp", and perform functions such as downloading configuration files and updating firmware without authorization.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.