How severe is CVE-2026-2874?

CVE-2026-2874 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-2874 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2874?

CVE-2026-2874 affects Tenda A21 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2874?

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

Does CVE-2026-2874 have an EU (EUVD) identifier?

Yes. CVE-2026-2874 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7589.

When was CVE-2026-2874 published?

CVE-2026-2874 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-2874

CVE-2026-2874 is a high-severity vulnerability in Tenda A21 Firmware with a CVSS 3.x base score of 8.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7589
Weakness: CWE-119
Affected product: Tenda A21 Firmware
Published: 2026-02-21
Last modified: 2026-06-17

Description

A flaw has been found in Tenda A21 1.0.0.0. Impacted is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. Executing a manipulation of the argument ssid can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

Frequently asked questions

What is CVE-2026-2874?: A flaw has been found in Tenda A21 1.0.0.0. Impacted is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. Executing a manipulation of the argument ssid can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.
How severe is CVE-2026-2874?: CVE-2026-2874 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-2874 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2874?: CVE-2026-2874 affects Tenda A21 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2874?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-2874 have an EU (EUVD) identifier?: Yes. CVE-2026-2874 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7589.
When was CVE-2026-2874 published?: CVE-2026-2874 was published on 2026-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:*

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