CVE-2026-2070
Published: 06 February 2026
Summary
CVE-2026-2070 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Utt 520W Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires validation of the GroupName input parameter to prevent buffer overflows triggered by oversized or malformed data in the strcpy function.
Implements memory protections such as non-executable stacks and address space randomization to mitigate successful exploitation of the buffer overflow for arbitrary code execution.
Mandates timely remediation of identified flaws like this publicly disclosed buffer overflow through patching, workarounds, or system isolation.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in router's web management interface (/goform/formPolicyRouteConf) enables remote exploitation of a public-facing application (T1190) by authenticated low-privilege users, facilitating arbitrary code execution consistent with exploitation for privilege escalation (T1068).
NVD Description
A vulnerability has been found in UTT 进取 520W 1.7.7-180627. The affected element is the function strcpy of the file /goform/formPolicyRouteConf. Such manipulation of the argument GroupName leads to buffer overflow. The attack can be executed remotely. The exploit has…
more
been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-2070 is a buffer overflow vulnerability in the UTT 进取 520W router running firmware version 1.7.7-180627. The issue resides in the strcpy function within the /goform/formPolicyRouteConf file, where improper handling of the GroupName argument allows overflow conditions. This flaw, classified under CWE-119 and CWE-120, was published on 2026-02-06 and carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
The vulnerability can be exploited remotely by an authenticated attacker with low privileges (PR:L) over the network with low complexity and no user interaction required. Successful exploitation of the buffer overflow could grant high confidentiality, integrity, and availability impacts, potentially enabling arbitrary code execution, data manipulation, or denial of service on the affected device.
Advisories referenced in sources such as VulDB (ctiid.344637, id.344637, submit.745264) and a GitHub repository detail the vulnerability and note that an exploit has been publicly disclosed and may be in use. The vendor was contacted early regarding the issue but provided no response, and no patches or mitigations are mentioned in the available information.
Details
- CWE(s)