How severe is CVE-2026-3970?

CVE-2026-3970 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-2026-3970 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3970?

CVE-2026-3970 affects Tenda I3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3970?

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-2026-3970 have an EU (EUVD) identifier?

Yes. CVE-2026-3970 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11497.

When was CVE-2026-3970 published?

CVE-2026-3970 was published on 2026-03-12 and last updated on 2026-06-17.

CVE-2026-3970

CVE-2026-3970 is a high-severity vulnerability in Tenda I3 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11497
Weakness: CWE-787
Affected product: Tenda I3 Firmware
Published: 2026-03-12
Last modified: 2026-06-17

Description

A flaw has been found in Tenda i3 1.0.0.6(2204). Affected is the function formwrlSSIDget of the file /goform/wifiSSIDget. Executing a manipulation of the argument index can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been published and may be used.

Frequently asked questions

What is CVE-2026-3970?: A flaw has been found in Tenda i3 1.0.0.6(2204). Affected is the function formwrlSSIDget of the file /goform/wifiSSIDget. Executing a manipulation of the argument index can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been published and may be used.
How severe is CVE-2026-3970?: CVE-2026-3970 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-2026-3970 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3970?: CVE-2026-3970 affects Tenda I3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3970?: 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-2026-3970 have an EU (EUVD) identifier?: Yes. CVE-2026-3970 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11497.
When was CVE-2026-3970 published?: CVE-2026-3970 was published on 2026-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:i3_firmware:1.0.0.6\(2204\):*:*:*:*:*:*:*

More vulnerabilities in Tenda I3 Firmware

CVE-2026-3971 — High (CVSS 8.8): A vulnerability has been found in Tenda i3 1.0.0.6(2204). Affected by this vulnerability is the function formwrlSSIDset…
CVE-2026-3804 — High (CVSS 8.8): A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function…
CVE-2026-3803 — High (CVSS 8.8): A vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file…
CVE-2026-3802 — High (CVSS 8.8): A vulnerability was determined in Tenda i3 1.0.0.6(2204). Affected by this issue is the function formexeCommand of the…
CVE-2026-3801 — High (CVSS 8.8): A vulnerability was found in Tenda i3 1.0.0.6(2204). Affected by this vulnerability is the function formSetAutoPing of…
CVE-2026-3799 — High (CVSS 8.8): A flaw has been found in Tenda i3 1.0.0.6(2204). This impacts the function formSetCfm of the file /goform/setcfm. This…

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