Description
A vulnerability was determined in Tenda W6-S 1.0.0.4(510). This impacts an unknown function of the file /bin/httpd of the component R7websSsecurityHandler. Executing manipulation of the argument Cookie can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-205819
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-205819 affects the Tenda W6-S router, specifically version 1.0.0.4(510). The issue resides in the /bin/httpd file within the R7websSsecurityHandler component. The vulnerability allows for a stack-based buffer overflow by manipulating the Cookie argument. This vulnerability is severe, with a CVSS Base Score of 9.3, indicating a critical risk.
CVSS Vector Breakdown:
- AV:N (Network): The vulnerability can be exploited remotely over the network.
- AC:L (Low): The attack complexity is low, meaning it does not require specialized conditions.
- AT:N (None): No authentication is required to exploit the vulnerability.
- PR:N (None): No privileges are required to exploit the vulnerability.
- UI:N (None): No user interaction is required to exploit the vulnerability.
- VC:H (High): The vulnerability has a high impact on confidentiality.
- VI:H (High): The vulnerability has a high impact on integrity.
- VA:H (High): The vulnerability has a high impact on availability.
- SC:N (None): The scope of the vulnerability does not change.
- SI:N (None): The scope of the impact does not change.
- SA:N (None): The scope of the attack does not change.
- E:P (Proof of Concept): There is a proof of concept available.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector is remote exploitation via network access. An attacker can manipulate the Cookie argument in HTTP requests to trigger a stack-based buffer overflow. This can lead to arbitrary code execution, allowing the attacker to gain control over the device.
Exploitation Methods:
- Crafted HTTP Requests: An attacker can send specially crafted HTTP requests with a manipulated
Cookieheader to the vulnerable/bin/httpdservice. - Automated Scripts: Attackers can use automated scripts to scan for vulnerable devices and exploit them en masse.
3. Affected Systems and Software Versions
The vulnerability specifically affects:
- Product: Tenda W6-S
- Version: 1.0.0.4(510)
Other versions of the Tenda W6-S and similar devices using the same R7websSsecurityHandler component may also be affected but have not been explicitly mentioned in the entry.
4. Recommended Mitigation Strategies
Immediate Actions:
- Patching: Apply the latest firmware update from Tenda as soon as it becomes available.
- Network Segmentation: Isolate the affected devices from critical networks to limit potential damage.
- Firewall Rules: Implement strict firewall rules to block unauthorized access to the device's web interface.
- Monitoring: Increase monitoring of network traffic to and from the affected devices to detect any suspicious activity.
Long-Term Strategies:
- Regular Updates: Ensure that all network devices are regularly updated with the latest security patches.
- Security Audits: Conduct regular security audits to identify and mitigate potential vulnerabilities.
- Intrusion Detection Systems (IDS): Deploy IDS to detect and respond to exploitation attempts.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to European cybersecurity, particularly for organizations and individuals using Tenda W6-S routers. The potential for remote exploitation and the high impact on confidentiality, integrity, and availability make it a critical concern. Organizations should prioritize mitigation efforts to prevent potential breaches and data loss.
6. Technical Details for Security Professionals
Vulnerability Details:
- Component:
R7websSsecurityHandler - File:
/bin/httpd - Function: Unknown function within the file
- Trigger: Manipulation of the
Cookieargument in HTTP requests
Exploit Characteristics:
- Stack-Based Buffer Overflow: The vulnerability allows for a stack-based buffer overflow, which can lead to arbitrary code execution.
- Public Disclosure: The exploit has been publicly disclosed, increasing the risk of widespread attacks.
References:
Aliases:
- CVE-2025-15255
Assigner:
- VulDB
EPSS:
- N/A
ENISA IDs:
- Product:
f228f561-5b92-3817-8b26-a9a28fd2c188 - Vendor:
adeb112d-e7df-3a00-8741-f9c9d9404161
By addressing this vulnerability promptly and effectively, organizations can significantly reduce the risk of cyber attacks and ensure the security of their networks.