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CVE-2020-29557

D-Link DIR-825 R1 Devices Buffer Overflow

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 54.3%
  1. Published29 Jan 2021
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

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

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

D-Link Dir-825 R1 Firmware≤ 3.0.1

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2020-29557 being actively exploited?

Yes. CVE-2020-29557 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-29557?

CVE-2020-29557 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 54.3% probability of exploitation.

Which products are affected by CVE-2020-29557?

Affected products include D-Link Dir-825 R1 Firmware.

How do I fix CVE-2020-29557?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-29557 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.