CVE-2020-27864

Name: CVE-2020-27864
Creator: NVD / NIST
Published: 2021-02-12T00:15:12.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 9.76%

Last modified Jun 17, 2026

CVE-2020-27864 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1860 firmware version 1.04B03 WiFi extenders. Authentication is not required to exploit this vulnerability. EPSS estimates a 9.76% chance of exploitation in the next 30 days.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1860 firmware version 1.04B03 WiFi extenders. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HNAP service, which listens on TCP port 80 by default. When parsing the Authorization request header, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-10880.

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

9.76%

94.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dap-1860 Firmware	<= 1.04b03

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10197Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1428/Third Party Advisory, VDB Entry
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10197Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1428/Third Party Advisory, VDB Entry

Timeline

Published: Feb 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27864?

How severe is CVE-2020-27864?

CVE-2020-27864 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 9.76% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27864?

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-2020-27864?

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

Scan your code now

Source: NVD / NIST