How severe is CVE-2026-5155?

CVE-2026-5155 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-2026-5155 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5155?

CVE-2026-5155 affects Tenda Ch22 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5155?

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-2026-5155 have an EU (EUVD) identifier?

Yes. CVE-2026-5155 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17249.

When was CVE-2026-5155 published?

CVE-2026-5155 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-5155

CVE-2026-5155 is a high-severity vulnerability in Tenda Ch22 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% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17249
Weakness: CWE-787
Affected product: Tenda Ch22 Firmware
Published: 2026-03-30
Last modified: 2026-06-17

Description

A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

Frequently asked questions

What is CVE-2026-5155?: A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.
How severe is CVE-2026-5155?: CVE-2026-5155 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-2026-5155 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5155?: CVE-2026-5155 affects Tenda Ch22 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5155?: 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-2026-5155 have an EU (EUVD) identifier?: Yes. CVE-2026-5155 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17249.
When was CVE-2026-5155 published?: CVE-2026-5155 was published on 2026-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ch22_firmware:1.0.0.1:*:*:*:*:*:*:*

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