How severe is CVE-2026-5156?

CVE-2026-5156 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-2026-5156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5156?

CVE-2026-5156 affects Tenda Ch22 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5156?

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-2026-5156 have an EU (EUVD) identifier?

Yes. CVE-2026-5156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17252.

When was CVE-2026-5156 published?

CVE-2026-5156 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2026-5156

CVE-2026-5156 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% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17252
Weakness: CWE-787
Affected product: Tenda Ch22 Firmware
Published: 2026-03-31
Last modified: 2026-06-17

Description

A vulnerability was determined in Tenda CH22 1.0.0.1. This impacts the function formQuickIndex of the file /goform/QuickIndex of the component Parameter Handler. This manipulation of the argument mit_linktype causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

Frequently asked questions

What is CVE-2026-5156?: A vulnerability was determined in Tenda CH22 1.0.0.1. This impacts the function formQuickIndex of the file /goform/QuickIndex of the component Parameter Handler. This manipulation of the argument mit_linktype causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
How severe is CVE-2026-5156?: CVE-2026-5156 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-2026-5156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5156?: CVE-2026-5156 affects Tenda Ch22 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5156?: 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-2026-5156 have an EU (EUVD) identifier?: Yes. CVE-2026-5156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17252.
When was CVE-2026-5156 published?: CVE-2026-5156 was published on 2026-03-31 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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