What is the CVSS score of CVE-2025-5608?

CVE-2025-5608 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Ac18 Firmware are affected by CVE-2025-5608?

A critical remote code execution vulnerability exists in Tenda AC18 routers (model 15.03.05.05) that allows unauthenticated attackers to execute arbitrary code through a buffer overflow exploit.

Is there a public PoC exploit available for CVE-2025-5608?

Yes, a public proof-of-concept exploit is available for CVE-2025-5608. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-5608?

Within 24 hours: Inventory all Tenda AC18 routers in production and isolate affected devices from critical networks if possible. Within 7 days: Implement network-level mitigations (WAF rules, access controls) and contact Tenda for patch availability status. Within 30 days: Develop a replacement strategy—either upgrade to patched firmware versions when available or transition to alternative router models from vendors with active security support.

Ac18 Firmware CVE-2025-5608

EUVD-2025-16922 HIGH

Buffer Overflow (CWE-119)

2025-06-04 cna@vuldb.com

Buffer Overflow RCE Ac18 Firmware Tenda

8.8

CVSS 3.1 · NVD

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

EUVD ID Assigned

Mar 14, 2026 - 17:29 euvd

EUVD-2025-16922

Analysis Generated

Mar 14, 2026 - 17:29 vuln.today

PoC Detected

Jun 17, 2025 - 20:41 vuln.today

Public exploit code

CVE Published

Jun 04, 2025 - 20:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability classified as critical has been found in Tenda AC18 15.03.05.05. Affected is the function formsetreboottimer of the file /goform/SetSysAutoRebbotCfg. The manipulation of the argument rebootTime leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

Critical remote buffer overflow vulnerability in Tenda AC18 router firmware version 15.03.05.05, affecting the reboot timer configuration function. An authenticated attacker can exploit improper input validation on the 'rebootTime' parameter to achieve remote code execution with full system compromise (confidentiality, integrity, availability). Public exploit code exists and the vulnerability is actively exploitable with low attack complexity.

Technical ContextAI

The vulnerability exists in the SetSysAutoRebbotCfg endpoint (/goform/SetSysAutoRebbotCfg), specifically within the formsetreboottimer function responsible for processing automatic reboot scheduling configuration. The root cause is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), a classic buffer overflow vulnerability. The affected product is a residential WiFi router (Tenda AC18) running firmware version 15.03.05.05. The vulnerable parameter 'rebootTime' lacks proper bounds checking before being written to a fixed-size buffer, allowing an attacker to overflow the buffer and overwrite adjacent memory including function return addresses or heap metadata. CPE identifier would be: cpe:2.3:o:tenda:ac18_firmware:15.03.05.05:*:*:*:*:*:*:*