What is the CVSS score of CVE-2025-55499?

CVE-2025-55499 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Ac6 Firmware are affected by CVE-2025-55499?

Organizations using Tenda AC6 V15.03.06.23_multi should be aware of notable risk from CVE-2025-55499, a buffer overflow vulnerability rated CVSS 6.5.

Is there a public PoC exploit available for CVE-2025-55499?

Yes, a public proof-of-concept exploit is available for CVE-2025-55499. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-55499?

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

Ac6 Firmware CVE-2025-55499

MEDIUM

Classic Buffer Overflow (CWE-120)

2025-08-20 cve@mitre.org

Buffer Overflow Tenda Ac6 Firmware

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:07 vuln.today

PoC Detected

Aug 21, 2025 - 18:22 vuln.today

Public exploit code

CVE Published

Aug 20, 2025 - 14:15 nvd

MEDIUM 6.5

DescriptionCVE.org

Tenda AC6 V15.03.06.23_multi was discovered to contain a buffer overflow via the ntpServer parameter in the fromSetSysTime function.

AnalysisAI

Tenda AC6 V15.03.06.23_multi was discovered to contain a buffer overflow via the ntpServer parameter in the fromSetSysTime function. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. 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 AC6 V15.03.06.23_multi was discovered to contain a buffer overflow via the ntpServer parameter in the fromSetSysTime function. Affected products include: Tenda Ac6 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.