CVE-2026-31027 Memory corruption in n/a
Remote attackers can trigger a buffer overflow in the TOTOlink A3600R router via the setAppEasyWizardConfig interface, potentially achieving arbitrary code execution or causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-31027?
CVE-2026-31027 is a critical memory corruption vulnerability in n/a, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of /lib/cste_modules/app.so. The vulnerability occurs because the rootSsid parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.
Weakness: CWE-120
Which versions are affected by CVE-2026-31027?
It affects 1 product.
Products include Totolink A3600r Firmware.
How do I fix CVE-2026-31027?
No fix has been published for CVE-2026-31027 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-31027 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31027 exists.
Other vulnerabilities in n/a
- CVE-2022-34993 Hardcoded credentials in n/a
- CVE-2022-25078 Command injection in n/a
- CVE-2026-1686 Totolink A3600R app.so setAppEasyWizardConfig buffer overflow
- CVE-2024-7174 TOTOLINK A3600R cstecgi.cgi setdeviceName buffer overflow
- CVE-2024-7176 TOTOLINK A3600R cstecgi.cgi setIpQosRules buffer overflow
Sources
Also known as GHSA-v5j6-9mr9-qwhr.