Buffer overflow in Trendnet Tew-821dap
CVE-2026-7607
A security vulnerability has been detected in TRENDnet TEW-821DAP 1.12B01. Impacted is the function auto_update_firmware of the component Firmware Udpate. The manipulation of the argument str leads to buffer overflow. The attack may be initiated remotely. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.
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: 0.006 · newest: 0.010 · change: +0.004
Affected products
- Trendnet Tew-821dap — versions 1.0r, 1.12B01
- Trendnet Tew-821dap Firmware — versions 1.12b01
Weakness classification (CWE)
References
- vuldb.com/vuln/360564 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/360564/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/806214 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_BO.md (Exploit, Third Party Advisory, patch)
Frequently asked questions
- What is CVE-2026-7607?
- CVE-2026-7607 is a high-severity vulnerability in Trendnet Tew-821dap, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-05-02.
- How severe is CVE-2026-7607?
- High severity. CVSS v3 base score is 8.8 out of 10.