How severe is CVE-2021-26797?

CVE-2021-26797 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26797?

CVE-2021-26797 affects Hametech Hame Sd1 Wi-fi Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26797?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-26797 published?

CVE-2021-26797 was published on 2021-04-26 and last updated on 2026-06-17.

CVE-2021-26797

CVE-2021-26797 is a critical-severity vulnerability in Hametech Hame Sd1 Wi-fi Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-521.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-521
Affected product: Hametech Hame Sd1 Wi-fi Firmware
Published: 2021-04-26
Last modified: 2026-06-17

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.

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26797?: CVE-2021-26797 affects Hametech Hame Sd1 Wi-fi Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-26797 published?: CVE-2021-26797 was published on 2021-04-26 and last updated on 2026-06-17.

References

https://le0nc.blogspot.com/2021/04/cve-2021-26797-access-control.html

Affected products (1)

cpe:2.3:o:hametech:hame_sd1_wi-fi_firmware:*:*:*:*:*:*:*:*

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