Author: Ameeba

Overview

CVE-2025-5608 is a critical vulnerability found in Tenda AC18 15.03.05.05, a widely used wireless router. This vulnerability lies in the formsetreboottimer function of the file /goform/SetSysAutoRebbotCfg. It is of particular concern because the vulnerability can be exploited remotely, posing a significant risk to users’ data security and system integrity. With the exploit already disclosed to the public, immediate actions are required to mitigate the threat.

Vulnerability Summary

CVE ID: CVE-2025-5608
Severity: Critical (8.8/10)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Tenda | AC18 15.03.05.05

How the Exploit Works

The vulnerability is a buffer overflow that occurs when an overly long argument is fed to the ‘rebootTime’ parameter in the formsetreboottimer function in the /goform/SetSysAutoRebbotCfg file of Tenda AC18. This overflow can then be manipulated to execute arbitrary code on the system. Given that this operation can be performed remotely, an attacker does not need physical access to the device to exploit this vulnerability.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited. This could be a sample HTTP POST request that sends an overly long rebootTime parameter:

POST /goform/SetSysAutoRebbotCfg HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
rebootTime=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA......

In this example, the ‘A’s represent an overly long argument, causing buffer overflow. An attacker could replace these ‘A’s with malicious code designed to compromise the system or leak data.

Mitigation

Users of Tenda AC18 15.03.05.05 are advised to apply the vendor’s patch as soon as possible. If the patch cannot be immediately applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation, effectively blocking attempts to exploit this vulnerability. As always, users should ensure that their systems and applications are regularly updated to the most recent versions to protect against known vulnerabilities.

Overview

Cybersecurity is a constantly evolving field, with new vulnerabilities appearing that challenge our defense strategies. This blog post will focus on CVE-2025-5630, a critical vulnerability that has been detected in D-Link DIR-816 1.10CNB05. This issue affects an unknown code component within the file /goform/form2lansetup.cgi, which can lead to a dangerous stack-based buffer overflow when the ‘ip’ argument is manipulated.
The severity of this vulnerability cannot be overstated, given its potential for remote exploitation. It poses a significant threat to outdated products no longer supported by their vendors, thereby raising the potential for data leakage or a complete system compromise.

Vulnerability Summary

CVE ID: CVE-2025-5630
Severity: Critical, CVSS Score 9.8
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

D-Link DIR-816 | 1.10CNB05

How the Exploit Works

The exploit works by manipulating the ‘ip’ argument in the /goform/form2lansetup.cgi file. This manipulation overflows the stack buffer causing unexpected behavior in the system. The overflow can overwrite other portions of memory, and the attacker could use this to execute arbitrary code. This allows potential unauthorized access to sensitive information, or even full control over the system.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited:

POST /goform/form2lansetup.cgi HTTP/1.1
Host: vulnerable_device_ip
Content-Type: application/x-www-form-urlencoded
ip=%s  # This is where the malicious input would be inserted

In the above example, the attacker would replace `%s` with a carefully crafted string designed to overflow the stack buffer.

Mitigation and Recommendations

For mitigation, it is recommended to apply vendor patches as soon as they become available. Since the affected products are no longer supported by the vendor, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation method.
However, the most effective course of action is to replace outdated and unsupported devices with newer ones that receive regular security updates from the manufacturer. Practicing good cybersecurity hygiene, such as regularly updating and patching systems, can help prevent exploitation of these types of vulnerabilities.

Overview

In the ever-evolving landscape of cybersecurity, a critical vulnerability has been discovered in the D-Link DIR-816 version 1.10CNB05. This vulnerability, termed as CVE-2025-5624, pertains to a stack-based buffer overflow that can potentially lead to system compromise or data leakage. It affects the QoSPortSetup function of the /goform/QoSPortSetup file. The vulnerability is of grave concern due to its high severity, remote attack capability, and the fact that it affects products that are no longer supported by the maintainer.

Vulnerability Summary

CVE ID: CVE-2025-5624
Severity: Critical – 9.8 CVSS v3
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System Compromise, Data Leakage

Affected Products

Product | Affected Versions

D-Link DIR-816 | 1.10CNB05

How the Exploit Works

The exploit works by manipulating the argument port0_group/port0_remarker/ssid0_group/ssid0_remarker in the QoSPortSetup function of the /goform/QoSPortSetup file. This manipulation leads to a stack-based buffer overflow, which in turn can lead to system compromise or data leakage. The attack can be initiated remotely, and hence poses a significant threat to the affected systems.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This example represents a malicious HTTP request that might be used to trigger the buffer overflow:

POST /goform/QoSPortSetup HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
port0_group=AAAAAAAA...AAAA&port0_remarker=BBBBBBBB...BBBB&ssid0_group=CCCCCCCC...CCCC&ssid0_remarker=DDDDDDDD...DDDD

In the above example, ‘A’, ‘B’, ‘C’, and ‘D’ represent an excessive amount of data which triggers the stack-based buffer overflow.
It’s essential to note that this vulnerability only affects products that are no longer supported by the maintainer. Therefore, the recommended mitigation is to apply the vendor patch or use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. As always, it’s recommended to upgrade to the latest supported versions of software whenever possible.

Overview

A critical vulnerability has been discovered in Tenda AC18 version 15.03.05.05, a popular router used by millions of people worldwide. This vulnerability, designated as CVE-2025-5607, affects the function formSetPPTPUserList in the file /goform/setPptpUserList. By manipulating the argument list, an attacker can trigger a buffer overflow condition, which can lead to potential system compromise or data leakage. As the vulnerability can be exploited remotely and the detailed exploit has been publically disclosed, it poses a severe threat to any individual or organization using the vulnerable versions of the device.

Vulnerability Summary

CVE ID: CVE-2025-5607
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System Compromise, Data Leakage

Affected Products

Product | Affected Versions

Tenda AC18 | 15.03.05.05

How the Exploit Works

The vulnerability resides in the formSetPPTPUserList function of the /goform/setPptpUserList file. An attacker can manipulate the argument list passed to this function leading to a buffer overflow. This overflow can overwrite crucial parts of the memory, allowing the attacker to execute arbitrary code or disrupt the normal functioning of the device. The attack can be initiated remotely without requiring any user interaction, making this a highly critical vulnerability.

Conceptual Example Code

The following is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP POST request, where the attacker sends a specially crafted JSON payload to the vulnerable endpoint:

POST /goform/setPptpUserList HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"argList": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."
}

In this example, the ‘argList’ value is filled with an excessive number of ‘A’ characters, causing a buffer overflow.

Mitigation

Users of Tenda AC18 version 15.03.05.05 are strongly advised to apply the vendor patch as soon as possible. If the patch is not available, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation. These measures can detect and block attempts to exploit this vulnerability until a more permanent solution is applied.

Overview

Common Vulnerabilities and Exposures (CVE) are a constant concern in the world of cybersecurity, and the CVE-2025-5600 is no exception. This critical vulnerability has been identified in TOTOLINK EX1200T version 4.1.2cu.5232_B20210713, a popular networking device. This vulnerability could potentially have far-reaching implications, allowing attackers to carry out remote attacks and gain unauthorized access.
The importance of addressing this vulnerability cannot be overstated. Given the potential for system compromise and data leakage, swift action is required to mitigate this risk and protect the integrity of the affected systems.

Vulnerability Summary

CVE ID: CVE-2025-5600
Severity: Critical (CVSS Severity Score: 9.8)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage.

Affected Products

Product | Affected Versions

TOTOLINK EX1200T | 4.1.2cu.5232_B20210713

How the Exploit Works

The vulnerability stems from a stack-based buffer overflow issue in the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. More specifically, the vulnerability arises from the improper handling of the LangType argument, which can be manipulated to overflow the buffer. This overflow can potentially allow an attacker to execute arbitrary code and gain unauthorized access to the system.

Conceptual Example Code

Below is a conceptual example of how this vulnerability could be exploited. This is not actual exploit code, but an illustration of the kind of request that could be used to take advantage of the vulnerability.

POST /cgi-bin/cstecgi.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
setLanguageCfg=1&LangType=<malicious_payload>

The “ would be a carefully crafted string designed to overflow the buffer and potentially execute arbitrary code.

Mitigation

Users of affected TOTOLINK EX1200T versions are strongly advised to apply the vendor-issued patch immediately. In the interim, employing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation against potential attacks. Regular monitoring and vigilance are also crucial in detecting any unusual activity.

Overview

CVE-2025-21468 is a notable vulnerability that lies in the memory buffer handling by firmware (FW) and its respective driver. This vulnerability is of significant concern as it affects a wide range of systems, potentially leading to system compromise or data leakage. The severity of the issue lies in the fact that it arises from a common operation – reading response from the firmware. It is a classic example of an overlooked bug that exploits the disparity between firmware and driver functionalities.

Vulnerability Summary

CVE ID: CVE-2025-21468
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: Low
User Interaction: None
Impact: System compromise and potential data leakage

Affected Products

Product | Affected Versions

[Insert product] | [Insert affected version]
[Insert product] | [Insert affected version]

How the Exploit Works

The exploit takes advantage of a memory corruption bug that occurs when the firmware changes the buffer size while the driver is using this size to write a null character at the end of the buffer. The driver, unaware of the change in buffer size, attempts to write beyond the allocated buffer, resulting in memory corruption.

Conceptual Example Code

This is a conceptual example of how the vulnerability might be exploited. In this case, the attacker uses a malicious firmware update that changes the buffer size when it is being used by the driver. Here is a pseudocode representation:

# Attacker's malicious firmware update
def malicious_fw_update():
# Change buffer size while it's being used by the driver
BUFFER_SIZE = NEW_SIZE
# Driver's function to write null character at the end of the buffer
def driver_write(buffer):
try:
buffer[BUFFER_SIZE] = '\0'
except BufferOverflowError:
# Handle error
pass

In this example, `driver_write` function will try to write a null character at the end of the buffer. However, if the `malicious_fw_update` function changes `BUFFER_SIZE` while `driver_write` is executing, a buffer overflow error will occur, corrupting memory and possibly leading to a system compromise.