How severe is CVE-2026-4252?

CVE-2026-4252 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-2026-4252 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4252?

CVE-2026-4252 affects Tenda Ac8 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4252?

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.

Does CVE-2026-4252 have an EU (EUVD) identifier?

Yes. CVE-2026-4252 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12470.

When was CVE-2026-4252 published?

CVE-2026-4252 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-4252

CVE-2026-4252 is a critical-severity vulnerability in Tenda Ac8 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
CVSS v4: 8.9
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12470
Weakness: CWE-287
Affected product: Tenda Ac8 Firmware
Published: 2026-03-16
Last modified: 2026-06-17

Description

A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Frequently asked questions

What is CVE-2026-4252?: A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
How severe is CVE-2026-4252?: CVE-2026-4252 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-2026-4252 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4252?: CVE-2026-4252 affects Tenda Ac8 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4252?: 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.
Does CVE-2026-4252 have an EU (EUVD) identifier?: Yes. CVE-2026-4252 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12470.
When was CVE-2026-4252 published?: CVE-2026-4252 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac8_firmware:16.03.50.11:*:*:*:*:*:*:*

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