Buffer overflow in Trendnet Tew-823dru
CVE-2026-75976
A weakness has been identified in TRENDnet TEW-823DRU 1.1.02b01. Impacted is the function strcpy of the file /cgi-bin/wan.cgi of the component NVRAM. This manipulation of the argument wan_l2tp_password causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (56.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% 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: 0.009 · change: +0.002
Affected products
- Trendnet Tew-823dru — versions 1.1.02b01
Weakness classification (CWE)
References
- vuldb.com/vuln/391892 (technical-description, vdb-entry)
- vuldb.com/vuln/391892/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-75976 (third-party-advisory)
- vuldb.com/submit/877796 (third-party-advisory)
- github.com/meishigana/CVE/tree/main/team15_20260702/10_823dru-rc-bof (related)
- github.com/meishigana/CVE/blob/main/team15_20260702/10_823dru-rc-bof/poc/poc-rc… (exploit)
Frequently asked questions
- What is CVE-2026-75976?
- CVE-2026-75976 is a critical-severity vulnerability in Trendnet Tew-823dru, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-08-19.
- How severe is CVE-2026-75976?
- Critical severity. CVSS v3 base score is 9.9 out of 10.