CVE-2026-0839 UTT 进取 520W APSecurity strcpy buffer overflow
Remote attackers can trigger a buffer overflow in the APSecurity component via the wepkey1 argument, 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-2026-0839?
CVE-2026-0839 is a high-severity memory corruption vulnerability in UTT 进取 520W, published on 11 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in UTT 进取 520W 1.7.7-180627. Affected is the function strcpy of the file /goform/APSecurity. Executing a manipulation of the argument wepkey1 can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-0839?
It affects 1 product.
Products include Utt 520w Firmware.
How do I fix CVE-2026-0839?
No fix has been published for CVE-2026-0839 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-2026-0839 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0839 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-55hm-v7vp-29ch.