What is the CVSS score of CVE-2026-1140?

CVE-2026-1140 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of 520w Firmware are affected by CVE-2026-1140?

Organizations using A vulnerability face significant risk from CVE-2026-1140, a buffer overflow vulnerability rated CVSS 8.8.

Is there a public PoC exploit available for CVE-2026-1140?

Yes, a public proof-of-concept exploit is available for CVE-2026-1140. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-1140?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

520w Firmware CVE-2026-1140

HIGH

Buffer Overflow (CWE-119)

2026-01-19 cna@vuldb.com

Buffer Overflow 520w Firmware Utt

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 04, 2026 - 20:42 vuln.today

Public exploit code

CVE Published

Jan 19, 2026 - 06:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was found in UTT 进取 520W 1.7.7-180627. This issue affects the function strcpy of the file /goform/ConfigExceptAli. The manipulation results in buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Remote code execution in UTT 520W firmware 1.7.7-180627 via a buffer overflow in the /goform/ConfigExceptAli endpoint allows authenticated attackers to execute arbitrary code with high privileges. Public exploit code exists for this vulnerability, and no patch is available from the vendor despite early disclosure notification. Affected organizations running vulnerable 520W devices should immediately isolate or replace equipment until a security update becomes available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects 520W Firmware. A vulnerability was found in UTT 进取 520W 1.7.7-180627. This issue affects the function strcpy of the file /goform/ConfigExceptAli. The manipulation results in buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.