CVE-2026-76590
CRITICALCVE-2026-76590 is a critical-severity (CVSS 9.9) Buffer Overflow vulnerability. O3 Security confirms whether CVE-2026-76590 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
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…
Description
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.
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for CVE-2026-76590 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-76590 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-76590. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-76590 in your dependencies?
O3 detects CVE-2026-76590 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.