High severity · published Jan 11, 2026
CVE-2026-0840
UTT 进取 520W formConfigNoticeConfig strcpy buffer overflow
8.8
CVSS
4.1%
EPSS
No
On KEV
Description
A security vulnerability has been detected in UTT 进取 520W 1.7.7-180627. Affected by this vulnerability is the function strcpy of the file /goform/formConfigNoticeConfig. The manipulation of the argument timestart leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.1% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
进5
进取 520W · UTT
1.7.7-180627 · source: vendor
5F
520w Firmware · Utt
through 1.7.7-180627 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0840
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0840
Exploit
https://github.com/GUOTINGTING2297/cve/blob/main/1234/30.md
Permissions Required
https://vuldb.com/?ctiid.340440
Third Party Advisory
https://vuldb.com/?id.340440
Third Party Advisory
https://vuldb.com/?submit.729029
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