How severe is CVE-2026-5686?

CVE-2026-5686 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-2026-5686 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5686?

CVE-2026-5686 affects Tenda Cx12l Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5686?

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-2026-5686 have an EU (EUVD) identifier?

Yes. CVE-2026-5686 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19543.

When was CVE-2026-5686 published?

CVE-2026-5686 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-5686

CVE-2026-5686 is a high-severity vulnerability in Tenda Cx12l 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% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19543
Weakness: CWE-119
Affected product: Tenda Cx12l Firmware
Published: 2026-04-06
Last modified: 2026-06-17

Description

A security flaw has been discovered in Tenda CX12L 16.03.53.12. This vulnerability affects the function fromRouteStatic of the file /goform/RouteStatic. The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

Frequently asked questions

What is CVE-2026-5686?: A security flaw has been discovered in Tenda CX12L 16.03.53.12. This vulnerability affects the function fromRouteStatic of the file /goform/RouteStatic. The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.
How severe is CVE-2026-5686?: CVE-2026-5686 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-2026-5686 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5686?: CVE-2026-5686 affects Tenda Cx12l Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5686?: 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-2026-5686 have an EU (EUVD) identifier?: Yes. CVE-2026-5686 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19543.
When was CVE-2026-5686 published?: CVE-2026-5686 was published on 2026-04-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:cx12l_firmware:16.03.53.12:*:*:*:*:*:*:*

More vulnerabilities in Tenda Cx12l Firmware

CVE-2026-8138 — High (CVSS 8.8): A vulnerability was found in Tenda CX12L 16.03.53.12. This issue affects the function formSetPPTPServer of the file…
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CVE-2026-5683 — Medium (CVSS 5.5): A vulnerability was found in Tenda CX12L 16.03.53.12. Affected by this vulnerability is the function fromP2pListFilter…

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