Buffer overflow in Trendnet Tew-755ap
CVE-2026-76590
A vulnerability was identified in TRENDnet TEW-755AP up to 20260702. Affected by this issue is some unknown functionality of the file /cgi-bin/wan.cgi of the component ssi. Such manipulation of the argument cameo.wan.wan_pppoe_password_00 leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.
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 (56.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.9% 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-755ap — versions 20260702
Weakness classification (CWE)
References
- vuldb.com/vuln/393087 (technical-description, vdb-entry)
- vuldb.com/vuln/393087/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-76590 (third-party-advisory)
- vuldb.com/submit/877850 (third-party-advisory)
- github.com/meishigana/CVE/tree/main/team15_20260702/15_755ap-ssi-bof (related)
- github.com/meishigana/CVE/blob/main/team15_20260702/15_755ap-ssi-bof/poc/poc-ss… (exploit)
Frequently asked questions
- What is CVE-2026-76590?
- CVE-2026-76590 is a critical-severity vulnerability in Trendnet Tew-755ap, 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-2026-76590?
- Critical severity. CVSS v3 base score is 9.9 out of 10.