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Findings

CVE-2020-29557

D-Link DIR-825 R1 Devices Buffer Overflow Vulnerability

Published Jan 29, 2021 · updated Jun 16, 2026 · dlink dir-825 r1 firmware

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.

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.

Required action

Apply updates per vendor instructions.

CISA due date May 3, 2022

Affected

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

Sources

  • CISA KEVCVE-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.orgCVE-2020-29557

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2020-29557

    30-day exploitation probability 54.3%

    first.org
  • NIST NVDCVE-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

References