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520w Firmware CVE-2026-0836

HIGH
Buffer Overflow (CWE-119)
2026-01-11 cna@vuldb.com
Buffer Overflow 520w Firmware
8.8
CVSS 3.1 · NVD
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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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 13, 2026 - 22:04 vuln.today
Public exploit code
CVE Published
Jan 11, 2026 - 05:15 nvd
HIGH 8.8

DescriptionCVE.org

A vulnerability was determined in UTT 进取 520W 1.7.7-180627. The impacted element is the function strcpy of the file /goform/formConfigFastDirectionW. This manipulation of the argument ssid causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Remote code execution in UTT 520W firmware versions up to 1.7.7-180627 allows authenticated attackers to execute arbitrary code through a buffer overflow in the /goform/formConfigFastDirectionW endpoint via the ssid parameter. Public exploit code exists for this vulnerability and the vendor has not released a patch despite early notification. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to device
Delivery
Send crafted HTTP POST to /goform/formConfigFastDirectionW
Exploit
Inject oversized SSID parameter
Execution
Overflow strcpy buffer
Impact
Execute arbitrary code
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Vulnerability AssessmentAI

Exploitation UTT 进取 520W firmware version 1.7.7-180627; authenticated user account required; /goform/formConfigFastDirectionW endpoint accessible; strcpy function processes unsanitized SSID parameter without bounds checking Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker could exploit this vulnerability to compromise the affected system.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. …

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CVE-2026-0836 vulnerability details – vuln.today
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