CVE-2021-44880

Name: CVE-2021-44880
Creator: NVD / NIST
Published: 2022-02-04T02:15:07.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.22%

Last modified Jun 17, 2026

CVE-2021-44880 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. D-Link devices DIR_878 DIR_878_FW1.30B08_Hotfix_02 and DIR_882 DIR_882_FW1.30B06_Hotfix_02 were discovered to contain a command injection vulnerability in the system function. This vulnerability allows attackers to execute arbitrary commands via a crafted HNAP1 POST request.. EPSS estimates a 4.22% chance of exploitation in the next 30 days.

Description

D-Link devices DIR_878 DIR_878_FW1.30B08_Hotfix_02 and DIR_882 DIR_882_FW1.30B06_Hotfix_02 were discovered to contain a command injection vulnerability in the system function. This vulnerability allows attackers to execute arbitrary commands via a crafted HNAP1 POST request.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.22%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions	Update
Dlink	Dir-878 Firmware	<= 1.20b05	—
Dlink	Dir-878 Firmware	1.30b08	Hotfix 02 Beta
Dlink	Dir-882 Firmware	<= 1.30b06	—
Dlink	Dir-882 Firmware	1.30b06	Hotfix 02 Beta

References

https://github.com/pjqwudi/my_vuln/blob/main/D-link/vuln_2/2.mdBroken Link
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10286Vendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10287Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://github.com/pjqwudi/my_vuln/blob/main/D-link/vuln_2/2.mdBroken Link
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10286Vendor Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10287Vendor Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-44880?

How severe is CVE-2021-44880?

CVE-2021-44880 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-44880?

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-2021-44880?

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

Scan your code now

Source: NVD / NIST