Which products and versions are affected by CVE-2020-29557?

Affected: Dir-825 R1 Firmware (Dlink). The full list is in the CVE brief.

Is CVE-2020-29557 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 1, 2021.

Is CVE-2020-29557 in the CISA KEV catalog?

Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.

Is there a public exploit for CVE-2020-29557?

Public exploit code is available.

Is there a fix for CVE-2020-29557?

Fixed versions are available, including Dir-825 R1 Firmware <=3.0.1, Dir-825 R1 Firmware 3.0.1.

How urgently should CVE-2020-29557 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2020-29557

Q: What is CVE-2020-29557?

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

Q: How urgently should CVE-2020-29557 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CriticalExploitedPublic exploit

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

Published Jan 29, 2021 · Updated Nov 7, 2025

Key Facts

Patch immediately

CVE-2020-29557 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Dir-825 R1 Firmware (Dlink).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 1, 2021. Public exploit code is available.
EPSS estimates a 54% probability of exploitation in the next 30 days.
Fixed versions are available, including Dir-825 R1 Firmware <=3.0.1, Dir-825 R1 Firmware 3.0.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

54%

Higher than 99.0% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2020-29557 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Nov 3, 2021	May 3, 2022	Not reported
Industry KEV feed	Jun 1, 2021	May 3, 2022	Not reported
CIRCL KEV	Nov 3, 2021	May 3, 2022	Not reported
ENISA EUVD	Nov 3, 2021	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Dir-825 R1 FirmwareDlink	See advisory	3.0.1

Patched Releases

Dir-825 R1 Firmware

<=3.0.1

Timeline

Publicly disclosed
Jan 29, 2021
Added to Industry KEV feed
Jun 1, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Nov 7, 2025

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

8 more references in the full CVE brief

FAQ

Common Questions.

An issue was discovered on D-Link DIR-825 R1 devices through 3.0.1 before 2020-11-20.
Affected: Dir-825 R1 Firmware (Dlink). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 1, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Dir-825 R1 Firmware <=3.0.1, Dir-825 R1 Firmware 3.0.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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