CVE-2020-29557

CRITICALNVD 9.89.8—

9.8

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 v3: 9.8
EG Score: 9.8(high)
EPSS: 99.7%
KEV: ⚠ Exploited

Published

January 29, 2021

Last Modified

November 7, 2025

References (5)

cve@mitrehttps://shaqed.github.io/dlink/
cve@mitrehttps://www.dlink.ru/ru/download2/5/19/2354/441/
af854a3a-2127-422b-91ae-364da2661108https://shaqed.github.io/dlink/
af854a3a-2127-422b-91ae-364da2661108https://www.dlink.ru/ru/download2/5/19/2354/441/
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29557

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 20:35 UTCkev_newly_listed
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 19:15 UTCEG score recompute
2026-05-26 19:15 UTCGHSA enrichment
2026-05-26 19:13 UTCkev_newly_listed
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(6)

What is CVE-2020-29557?

CVE-2020-29557 is a critical vulnerability published on January 29, 2021. 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.

When was CVE-2020-29557 disclosed?

CVE-2020-29557 was first published in the National Vulnerability Database on January 29, 2021, with the most recent update on November 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-29557 actively exploited?

Yes. CISA added CVE-2020-29557 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting D-Link DIR-825 R1 Devices. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2020-29557?

CVE-2020-29557 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2020-29557?

CVE-2020-29557 affects D-Link DIR-825 R1 Devices. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2020-29557?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-29557, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-29557

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CVE-2020-29557

📅 Published

🔄 Last Modified

🔗 References (5)