How severe is CVE-2026-8259?

CVE-2026-8259 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-8259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8259?

CVE-2026-8259 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8259?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-8259 have an EU (EUVD) identifier?

Yes. CVE-2026-8259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29015.

When was CVE-2026-8259 published?

CVE-2026-8259 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-8259

CVE-2026-8259 is a medium-severity vulnerability in Tenda Ac6 Firmware with a CVSS 3.x base score of 4.7. 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-78.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 5.8
CVSS v4: 2.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29015
Weakness: CWE-78
Affected product: Tenda Ac6 Firmware
Published: 2026-05-11
Last modified: 2026-06-17

Description

A vulnerability has been found in Tenda AC6 2.0/15.03.06.23. The affected element is an unknown function of the file /goform/telnet of the component httpd. The manipulation of the argument lan.ip leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2026-8259?: A vulnerability has been found in Tenda AC6 2.0/15.03.06.23. The affected element is an unknown function of the file /goform/telnet of the component httpd. The manipulation of the argument lan.ip leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-8259?: CVE-2026-8259 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-8259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8259?: CVE-2026-8259 affects Tenda Ac6 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8259 have an EU (EUVD) identifier?: Yes. CVE-2026-8259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29015.
When was CVE-2026-8259 published?: CVE-2026-8259 was published on 2026-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac6_firmware:15.03.06.23:*:*:*:*:*:*:*

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