CVE-2026-1139 UTT 进取 520W ConfigExceptMSN strcpy buffer overflow
Remote attackers can trigger a buffer overflow in the UTT 520W router's ConfigExceptMSN handler, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1139?
CVE-2026-1139 is a high-severity memory corruption vulnerability in UTT 进取 520W, published on 19 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in UTT 进取 520W 1.7.7-180627. This vulnerability affects the function strcpy of the file /goform/ConfigExceptMSN. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-1139?
It affects 1 product.
Products include Utt 520w Firmware.
How do I fix CVE-2026-1139?
No fix has been published for CVE-2026-1139 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-2026-1139 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1139 exists.
Other vulnerabilities in UTT 进取 520W
- CVE-2026-31059 Command injection in n/a
- CVE-2026-2071 UTT 进取 520W formP2PLimitConfig strcpy buffer overflow
- CVE-2026-2066 UTT 进取 520W formIpGroupConfig strcpy buffer overflow
- CVE-2026-2067 UTT 进取 520W formTimeGroupConfig strcpy buffer overflow
- CVE-2026-2068 UTT 进取 520W formSyslogConf strcpy buffer overflow
Sources
Also known as GHSA-xxjh-3xfp-3f5r.