CVE-2025-6887
BaseFortify
Publication date: 2025-06-30
Last updated on: 2025-07-01
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | ac5_firmware | 15.03.06.47 |
| tenda | ac5 | 1.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-6887 is a critical stack-based buffer overflow vulnerability in the Tenda AC5 router firmware version 15.03.06.47. It occurs in the /goform/SetSysTimeCfg endpoint when an attacker manipulates the 'time' or 'timeZone' parameters with crafted input. This improper input validation causes a stack overflow, which can be exploited remotely without authentication. The vulnerability can lead to arbitrary code execution or denial of service on the device. [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can severely impact you by allowing remote attackers to execute arbitrary code or cause denial of service on your Tenda AC5 router. Since it can be exploited without authentication, attackers can compromise the confidentiality, integrity, and availability of your device, potentially disrupting your network and exposing it to further attacks. [1, 2, 3]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring or testing for suspicious POST requests to the /goform/SetSysTimeCfg endpoint, specifically those manipulating the "time" or "timeZone" parameters with unusually long or malformed input that could trigger a stack-based buffer overflow. Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on such requests. For manual testing, you could use curl or similar tools to send crafted POST requests to the endpoint and observe the device's behavior. Example command: curl -X POST http://<router-ip>/goform/SetSysTimeCfg -d "timeZone=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA". If the device crashes or behaves abnormally, it may be vulnerable. [1, 2, 3]
What immediate steps should I take to mitigate this vulnerability?
Currently, no known countermeasures or mitigations exist for this vulnerability. The recommended immediate step is to consider replacing the affected Tenda AC5 router with a non-vulnerable device. Additionally, restricting remote access to the router's management interface and monitoring for exploit attempts can help reduce risk until a patch or fix is available. [1]