ChangingtecCVEs & Vulnerabilities

22 CVEs affecting Changingtec products, tracked from the National Vulnerability Database, with CVSS/EPSS scores and exploitation status.

Most Affected Products

servisign 6rava certificate validation system 4tcb servisign 4megaservisignadapter 3idexpert 2motp 1mobile one time password 1hwatai servisign 1
CVE-2026-3000CRITICAL

IDExpert Windows Logon Agent developed by Changing has a Remote Code Execution vulnerability, allowing unauthenticated remote attackers to force the system to download arbitrary DLL files from a remote source and execute them.

2 Mar 2026
9.8
CVSS
CVE-2026-2999CRITICAL

IDExpert Windows Logon Agent developed by Changing has a Remote Code Execution vulnerability, allowing unauthenticated remote attackers to force the system to download arbitrary executable files from a remote source and execute them.

2 Mar 2026
9.8
CVSS
CVE-2024-40723MEDIUM

The specific API in HWATAIServiSign Windows Version from CHANGING Information Technology does not properly validate the length of server-side inputs. When a user visits a spoofed website, unauthenticated remote attackers can cause a stack-based buffer overflow in the HWATAIServiSign, temporarily disrupting its service.

2 Aug 2024
4.3
CVSS
CVE-2024-40722MEDIUM

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does does not properly validate the length of server-side input. When a user visits a spoofed website, unauthenticated remote attackers can cause a stack-based buffer overflow in the TCBServiSign, temporarily disrupting its service.

2 Aug 2024
4.3
CVSS
CVE-2024-40721HIGH

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does not properly validate server-side input. When a user visits a spoofed website, unauthenticated remote attackers can cause the TCBServiSign to load a DLL from an arbitrary path.

2 Aug 2024
8.8
CVSS
CVE-2024-40720HIGH

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does not properly validate server-side input. When a user visits a spoofed website, unauthenticated remote attackers can modify the `HKEY_CURRENT_USER` registry to execute arbitrary commands.

2 Aug 2024
8.8
CVSS
CVE-2024-40719MEDIUM

The encryption strength of the authorization keys in CHANGING Information Technology TCBServiSign Windows Version is insufficient. When a remote attacker tricks a victim into visiting a malicious website, TCBServiSign will treat that website as a legitimate server and interact with it.

2 Aug 2024
6.5
CVSS
CVE-2023-22901MEDIUM

ChangingTec MOTP system has a path traversal vulnerability. A remote attacker with administrator’s privilege can exploit this vulnerability to access arbitrary system files.

27 Apr 2023
4.9
CVSS
CVE-2022-39061MEDIUM

ChangingTech MegaServiSignAdapter component has a vulnerability of Out-of-bounds Read due to insufficient validation for parameter length. An unauthenticated remote attacker can exploit this vulnerability to access partial sensitive content in memory and disrupts partial services.

31 Jan 2023
6.5
CVSS
CVE-2022-39060CRITICAL

ChangingTech MegaServiSignAdapter component has a vulnerability of improper input validation. An unauthenticated remote attacker can exploit this vulnerability to access and modify HKEY_CURRENT_USER subkey (ex: AutoRUN) in Registry where malicious scripts can be executed to take control of the system or to terminate the service.

31 Jan 2023
9.8
CVSS
CVE-2022-39059HIGH

ChangingTech MegaServiSignAdapter component has a path traversal vulnerability within its file reading function. An unauthenticated remote attacker can exploit this vulnerability to access arbitrary system files.

31 Jan 2023
7.5
CVSS
CVE-2022-46306HIGH

ChangingTec ServiSign component has a path traversal vulnerability due to insufficient filtering for special characters in the DLL file path. An unauthenticated remote attacker can host a malicious website for the component user to access, which triggers the component to load malicious DLL files under arbitrary file path and allows the attacker to perform arbitrary system operation and disrupt of service.

3 Jan 2023
7.8
CVSS
CVE-2022-46305MEDIUM

ChangingTec ServiSign component has a path traversal vulnerability. An unauthenticated LAN attacker can exploit this vulnerability to bypass authentication and access arbitrary system files.

3 Jan 2023
6.5
CVSS
CVE-2022-46304HIGH

ChangingTec ServiSign component has insufficient filtering for special characters in the connection response parameter. An unauthenticated remote attacker can host a malicious website for the component user to access, which triggers command injection and allows the attacker to execute arbitrary system command to perform arbitrary system operation or disrupt service.

3 Jan 2023
8.8
CVSS
CVE-2022-39058HIGH

RAVA certification validation system has a path traversal vulnerability. An unauthenticated remote attacker can exploit this vulnerability to bypass authentication and access arbitrary system files.

18 Oct 2022
7.5
CVSS
CVE-2022-39057HIGH

RAVA certificate validation system has insufficient filtering for special parameter of the web page input field. A remote attacker with administrator privilege can exploit this vulnerability to perform arbitrary system command and disrupt service.

18 Oct 2022
7.2
CVSS
CVE-2022-39056CRITICAL

RAVA certificate validation system has insufficient validation for user input. An unauthenticated remote attacker can inject arbitrary SQL command to access, modify and delete database.

18 Oct 2022
9.8
CVSS
CVE-2022-39055MEDIUM

RAVA certificate validation system has inadequate filtering for URL parameter. An unauthenticated remote attacker can perform SSRF attack to discover internal network topology base on query response.

18 Oct 2022
5.3
CVSS
CVE-2021-44161HIGH

Changing MOTP (Mobile One Time Password) system’s specific function parameter has insufficient validation for user input. A attacker in local area network can perform SQL injection attack to read, modify or delete backend database without authentication.

29 Dec 2021
8.8
CVSS
CVE-2020-3927HIGH

An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.

3 Feb 2020
7.5
CVSS
CVE-2020-3926HIGH

An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.

3 Feb 2020
7.5
CVSS
CVE-2020-3925HIGH

A Remote Code Execution(RCE) vulnerability exists in some designated applications in ServiSign security plugin, as long as the interface is captured, attackers are able to launch RCE and executes arbitrary command on target system via malicious crafted scripts.

3 Feb 2020
8.8
CVSS
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