How severe is CVE-2026-6015?

CVE-2026-6015 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-2026-6015 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6015?

CVE-2026-6015 affects Tenda Ac9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6015?

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-2026-6015 have an EU (EUVD) identifier?

Yes. CVE-2026-6015 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21311.

When was CVE-2026-6015 published?

CVE-2026-6015 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-6015

CVE-2026-6015 is a high-severity vulnerability in Tenda Ac9 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% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21311
Weakness: CWE-119
Affected product: Tenda Ac9 Firmware
Published: 2026-04-10
Last modified: 2026-06-17

Description

A vulnerability has been found in Tenda AC9 15.03.02.13. Impacted is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. Such manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2026-6015?: A vulnerability has been found in Tenda AC9 15.03.02.13. Impacted is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. Such manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-6015?: CVE-2026-6015 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-2026-6015 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6015?: CVE-2026-6015 affects Tenda Ac9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6015?: 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-2026-6015 have an EU (EUVD) identifier?: Yes. CVE-2026-6015 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21311.
When was CVE-2026-6015 published?: CVE-2026-6015 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac9_firmware:15.03.02.13:*:*:*:*:*:*:*

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