Vulnerability · Published Mar 26, 2026 · Assigned by VulDB
CVE-2026-4903Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption
High 8.8
In plain English
A high-severity stack buffer overflow in AC5 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 5.7% (higher than 93% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)5.7%top 7.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-353654 | Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption vdb-entry, technical-description
- VDB-353654 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #777380 | Tenda AC5 AC5 V1.0 V15.03.06.47 Buffer Overflow third-party-advisory
- https://lavender-bicycle-a5a.notion.site/Tenda_AC5_QuickIndex_PPPOEPassword-32053a41781f808dae98f99c99bcb21c?source=copy_link exploit
- https://www.tenda.com.cn/ product