CVE-2026-2935
Published: 22 February 2026
Summary
CVE-2026-2935 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Utt 810G Firmware. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 35.8th 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 AC-6 (Least Privilege).
Deeper analysis
CVE-2026-2935 is a buffer overflow vulnerability affecting UTT HiPER 810G routers in versions up to 1.7.7-171114. The flaw occurs in the strcpy function within the /goform/ConfigExceptMSN file, where manipulation of the "remark" argument triggers the overflow. Published on 2026-02-22, it is associated with CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input).
The vulnerability is remotely exploitable over the network with low attack complexity and no user interaction required, but exploitation demands high privileges (PR:H) on the target system. Successful attacks can result in high impacts to confidentiality, integrity, and availability (C:H/I:H/A:H), as reflected in its CVSS v3.1 base score of 7.2, potentially enabling arbitrary code execution or denial of service.
VulDB advisories (ctiid.347297, id.347297, submit.755297) and a GitHub issue (alc9700jmo/CVE/issues/23) document the vulnerability details, including a publicly available exploit that could facilitate real-world attacks against unpatched devices. No specific patches or mitigations are detailed in these references.
The public availability of the exploit elevates the risk for exposed UTT HiPER 810G instances, urging practitioners to assess and isolate affected systems pending vendor guidance.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-7693
Vulnerability details
A weakness has been identified in UTT HiPER 810G up to 1.7.7-171114. This issue affects the function strcpy of the file /goform/ConfigExceptMSN. Executing a manipulation of the argument remark can lead to buffer overflow. The attack can be executed remotely.…
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The exploit has been made available to the public and could be used for attacks.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in router web form (/goform/ConfigExceptMSN) enables RCE after high-priv auth, directly mapping to exploitation of public-facing apps (T1190) and/or priv esc to root/shell (T1068).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of input size and format for the 'remark' argument before the unsafe strcpy call, preventing the buffer overflow.
Enforces least privilege so that only the minimal accounts can reach /goform/ConfigExceptMSN, reducing the chance an attacker obtains the required high privileges.
Mandates memory-protection mechanisms (DEP, ASLR, etc.) that can block or contain exploitation of the strcpy overflow even if input validation fails.