What is the CVSS score of CVE-2025-55503?

CVE-2025-55503 has a CVSS 3.1 base score of 7.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Ac6 Firmware are affected by CVE-2025-55503?

Organizations using Tenda AC6 V15.03.06.23_multi face moderate risk from CVE-2025-55503, a stack-based buffer overflow vulnerability rated CVSS 7.3.

Is there a public PoC exploit available for CVE-2025-55503?

Yes, a public proof-of-concept exploit is available for CVE-2025-55503. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-55503?

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.

Ac6 Firmware CVE-2025-55503

HIGH

Stack-based Buffer Overflow (CWE-121)

2025-08-20 cve@mitre.org

Tenda Buffer Overflow Stack Overflow Ac6 Firmware

7.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.3 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:07 vuln.today

PoC Detected

Aug 21, 2025 - 14:30 vuln.today

Public exploit code

CVE Published

Aug 20, 2025 - 14:15 nvd

HIGH 7.3

DescriptionCVE.org

Tenda AC6 V15.03.06.23_multi has a stack overflow vulnerability via the deviceName parameter in the saveParentControlInfo function.

AnalysisAI

Tenda AC6 V15.03.06.23_multi has a stack overflow vulnerability via the deviceName parameter in the saveParentControlInfo function. Rated high severity (CVSS 7.3), 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 under CWE-121. Tenda AC6 V15.03.06.23_multi has a stack overflow vulnerability via the deviceName parameter in the saveParentControlInfo function. Affected products include: Tenda Ac6 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

CVE-2025-55503 vulnerability details – vuln.today

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