CVE-2026-4862
Published: 26 March 2026
Summary
CVE-2026-4862 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 37.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-4862 is a buffer overflow vulnerability affecting the UTT HiPER 1250GW router in versions up to 3.2.7-210907-180535. The flaw occurs in the strcpy function within the file /goform/formConfigDnsFilterGlobal of the Parameter Handler component, where manipulation of the GroupName argument triggers the overflow. It is classified under CWE-119 and CWE-120.
The vulnerability enables remote exploitation by an attacker with low privileges over the network. Per its CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), a low-privileged remote actor requires no user interaction and can achieve high impacts on confidentiality, integrity, and availability, potentially resulting in arbitrary code execution or system compromise.
Advisories and exploit details are documented in references such as the GitHub repository at https://github.com/kirlic123/IOTvulner/blob/main/309-1/5.md and VulDB entries at https://vuldb.com/?ctiid.353193, https://vuldb.com/?id.353193, and https://vuldb.com/?submit.776230. The exploit has been publicly disclosed and may be used by attackers.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-16152
Vulnerability details
A security vulnerability has been detected in UTT HiPER 1250GW up to 3.2.7-210907-180535. This issue affects the function strcpy of the file /goform/formConfigDnsFilterGlobal of the component Parameter Handler. Such manipulation of the argument GroupName leads to buffer overflow. The attack…
more
can be launched remotely. The exploit has been disclosed publicly and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in remotely accessible web form (/goform/formConfigDnsFilterGlobal) on network device directly enables remote exploitation of a public-facing application for arbitrary code execution and system compromise.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 directly remediates the buffer overflow flaw in the strcpy function by identifying, patching, and verifying fixes for this specific CVE.
SI-10 enforces validation of the GroupName parameter input to prevent buffer overflows from oversized or malformed data in the Parameter Handler.
SI-16 implements memory protections like address space layout randomization and data execution prevention to mitigate arbitrary code execution from the buffer overflow.