Buffer overflow in Tenda Ac9
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.010 · change: +0.002
Affected products
- Tenda Ac9 — versions 1.0, 15.03.02.13
- Tenda Ac9 Firmware — versions 15.03.02.13
Weakness classification (CWE)
References
- vuldb.com/vuln/356571 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/356571/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/791828 (VDB Entry, Third Party Advisory, third-party-advisory)
- lavender-bicycle-a5a.notion.site/Tenda-AC9-QuickIndex-33153a41781f80458940f212f… (Exploit, Third Party Advisory, exploit)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-6015?
- CVE-2026-6015 is a high-severity vulnerability in Tenda Ac9, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-04-10.
- How severe is CVE-2026-6015?
- High severity. CVSS v3 base score is 8.8 out of 10.