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Vulnerabilities

Vulnerability · CVE-2020-29557

D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability

Published Jan 29, 2021 · catalog updated Jun 16, 2026 · D-Link DIR-825 R1 Devices

Patch now

CVE-2020-29557 is in the CISA known-exploited catalog, due May 3, 2022. 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
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
54.32%
Remediation
Remediation guidance
Affected products
cpe dlink/dir-825 r1 firmware · vendor D-Link DIR-825 R1 Devices

An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

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.

  • cpe dlink/dir-825 r1 firmwareversion unspecified
  • vendor D-Link DIR-825 R1 Devicesversion unspecified

How to fix CVE-2020-29557

What to do

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

Should you patch?

CVE-2020-29557 is in the CISA known-exploited catalog, due May 3, 2022. 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 updates per vendor instructions.

What should an analyst verify?

CWE-119: Buffer Overflow. EPSS 54.32%. 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. Jan 29, 2021 · Catalog

    Detected

    An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

Sources

  • CISA KEVConfirmed exploitationCVE-2020-29557

    D-Link DIR-825 R1 devices contain a buffer overflow vulnerability in the web interface that may allow for remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-29557

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-29557

    30-day exploitation probability 54.3%

    first.org
  • NIST NVDVulnerability recordCVE-2020-29557

    An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20. A buffer overflow in the web interface allows attackers to achieve pre-authentication remote code execution.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-29557

    D-Link DIR-825 R1 devices contain a buffer overflow vulnerability in the web interface that may allow for remote code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.