CVE-2021-26797

Name: CVE-2021-26797
Creator: NVD / NIST
Published: 2021-04-26T12:15:07.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.35%

Last modified Jun 17, 2026

CVE-2021-26797 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An access control vulnerability in Hame SD1 Wi-Fi firmware <=V.20140224154640 allows an attacker to get system administrator through an open Telnet service.. EPSS estimates a 1.35% chance of exploitation in the next 30 days.

Description

An access control vulnerability in Hame SD1 Wi-Fi firmware <=V.20140224154640 allows an attacker to get system administrator through an open Telnet service.

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

1.35%

68.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-521

Affected Software

Vendor	Product	Versions
Hametech	Hame Sd1 Wi-Fi Firmware	<= 20140224154640

References

https://le0nc.blogspot.com/2021/04/cve-2021-26797-access-control.htmlExploit, Third Party Advisory
https://le0nc.blogspot.com/2021/04/cve-2021-26797-access-control.htmlExploit, Third Party Advisory

Timeline

Published: Apr 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26797?

An access control vulnerability in Hame SD1 Wi-Fi firmware <=V.20140224154640 allows an attacker to get system administrator through an open Telnet service.

How severe is CVE-2021-26797?

CVE-2021-26797 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26797?

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-2021-26797?

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

Scan your code now

Source: NVD / NIST