Critical 9.8Known exploited (CISA KEV)Published Jan 29, 2021

CVE-2020-29557An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20.

Updated under an hour ago (2026-10-19 07:20 UTC)

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It affects dlink dir-825_r1_firmware. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.

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Every CVE for dlink dir-825_r1_firmware

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
Known exploited: Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 54.32% (percentile 99)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

dlink dir-825_r1_firmware dlink:dir-825_r1_firmware	through 3.0.1	NVD

References

https://www.dlink.ru/ru/download2/5/19/2354/441/x-refsource-misc, product
https://shaqed.github.io/dlink/x-refsource-misc, broken-link, exploit, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.