What is the CVSS score of CVE-2025-30256?

CVE-2025-30256 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Ac6 Firmware are affected by CVE-2025-30256?

Organizations using the HTTP Header Parsing functionality of Tenda AC6 face significant risk from CVE-2025-30256 rated CVSS 8.6.

How to fix or mitigate CVE-2025-30256?

Within 30 days: Identify all affected systems running the HTTP Header Parsing functionality of Tenda AC6 and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Ac6 Firmware CVE-2025-30256

HIGH

Missing Release of Resource after Effective Lifetime (CWE-772)

2025-08-20 talos-cna@cisco.com

Denial Of Service Tenda Ac6 Firmware

8.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:07 vuln.today

CVE Published

Aug 20, 2025 - 14:15 nvd

HIGH 8.6

DescriptionCVE.org

A denial of service vulnerability exists in the HTTP Header Parsing functionality of Tenda AC6 V5.0 V02.03.01.110. A specially crafted series of HTTP requests can lead to a reboot. An attacker can send multiple network packets to trigger this vulnerability.

AnalysisAI

A denial of service vulnerability exists in the HTTP Header Parsing functionality of Tenda AC6 V5.0 V02.03.01.110. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-772. A denial of service vulnerability exists in the HTTP Header Parsing functionality of Tenda AC6 V5.0 V02.03.01.110. A specially crafted series of HTTP requests can lead to a reboot. An attacker can send multiple network packets to trigger this vulnerability. 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.