What is the CVSS score of CVE-2025-55603?

CVE-2025-55603 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Ax3 Firmware are affected by CVE-2025-55603?

Organizations using Tenda AX3 V16.03.12.10_CN face notable risk from CVE-2025-55603, a buffer overflow vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2025-55603?

Yes, a public proof-of-concept exploit is available for CVE-2025-55603. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-55603?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Ax3 Firmware CVE-2025-55603

HIGH

Classic Buffer Overflow (CWE-120)

2025-08-22 cve@mitre.org

Buffer Overflow Tenda Ax3 Firmware

7.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:08 vuln.today

PoC Detected

Sep 26, 2025 - 12:53 vuln.today

Public exploit code

CVE Published

Aug 22, 2025 - 16:15 nvd

HIGH 7.5

DescriptionNVD

Tenda AX3 V16.03.12.10_CN is vulnerable to Buffer Overflow in the fromSetSysTime function via the ntpServer parameter.

AnalysisAI

Tenda AX3 V16.03.12.10_CN is vulnerable to Buffer Overflow in the fromSetSysTime function via the ntpServer parameter. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. Tenda AX3 V16.03.12.10_CN is vulnerable to Buffer Overflow in the fromSetSysTime function via the ntpServer parameter. Affected products include: Tenda Ax3 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.

CVE-2025-55603 vulnerability details – vuln.today

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Ax3 Firmware CVE-2025-55603

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code