How severe is CVE-2026-3378?

CVE-2026-3378 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-2026-3378 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3378?

CVE-2026-3378 affects Tenda F453 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3378?

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-2026-3378 have an EU (EUVD) identifier?

Yes. CVE-2026-3378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9114.

When was CVE-2026-3378 published?

CVE-2026-3378 was published on 2026-03-01 and last updated on 2026-06-17.

CVE-2026-3378

CVE-2026-3378 is a high-severity vulnerability in Tenda F453 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% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9114
Weakness: CWE-119
Affected product: Tenda F453 Firmware
Published: 2026-03-01
Last modified: 2026-06-17

Description

A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromqossetting of the file /goform/qossetting. Executing a manipulation of the argument qos can lead to buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.

Frequently asked questions

What is CVE-2026-3378?: A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromqossetting of the file /goform/qossetting. Executing a manipulation of the argument qos can lead to buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.
How severe is CVE-2026-3378?: CVE-2026-3378 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-2026-3378 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3378?: CVE-2026-3378 affects Tenda F453 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3378?: 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-2026-3378 have an EU (EUVD) identifier?: Yes. CVE-2026-3378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9114.
When was CVE-2026-3378 published?: CVE-2026-3378 was published on 2026-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:f453_firmware:1.0.0.3:*:*:*:*:*:*:*

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