CVE-2020-15633

Name: CVE-2020-15633
Creator: NVD / NIST
Published: 2020-07-23T21:15:12.033+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.77%

Last modified Jun 17, 2026

CVE-2020-15633 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.20B10_BETA. Authentication is not required to exploit this vulnerability. EPSS estimates a 2.77% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.20B10_BETA. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP requests. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router. Was ZDI-CAN-10835.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.77%

84.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-288

Affected Software

Vendor	Product	Versions
D-Link	Dir-867 Firmware	<= 1.20b10
D-Link	Dir-878 Firmware	<= 1.20b05
D-Link	Dir-882 Firmware	All versions

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-881/Third Party Advisory, VDB Entry
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-881/Third Party Advisory, VDB Entry

Timeline

Published: Jul 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15633?

How severe is CVE-2020-15633?

CVE-2020-15633 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.77% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15633?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15633?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST