CVE-2024-7156
Published: 28 July 2024
Summary
CVE-2024-7156 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) vulnerability in Totolink A3700R Firmware. Its CVSS base score is 6.9 (Medium).
Operationally, ranked in the top 7.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2024-7156 is an information disclosure vulnerability in the TOTOLINK A3700R router running firmware 9.1.2u.5822_B20200513. It resides in the apmib Configuration Handler component, specifically the /cgi-bin/ExportSettings.sh file, where improper access controls allow an attacker to retrieve sensitive configuration data.
The flaw is remotely exploitable without authentication or user interaction. An attacker who can reach the device's web interface can directly request the affected endpoint to obtain configuration details that should otherwise remain protected.
Public references, including a proof-of-concept on GitHub and entries on VulDB, confirm the issue was disclosed externally after the vendor failed to respond to early notification. No official patches or mitigation guidance have been issued.
The EPSS score has remained flat at 0.0866 with no material rise since publication, indicating limited observed exploitation interest to date despite the availability of public exploit code.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-48124
Vulnerability details
A vulnerability was found in TOTOLINK A3700R 9.1.2u.5822_B20200513 and classified as problematic. Affected by this issue is some unknown functionality of the file /cgi-bin/ExportSettings.sh of the component apmib Configuration Handler. The manipulation leads to information disclosure. The attack may be…
more
launched remotely. The exploit has been disclosed to the public and may be used. VDB-272570 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Automated marking applies security attributes to system outputs, making it harder for attackers to exploit unmarked sensitive information leading to unauthorized exposure.
Proper attribute retention and permitted-value enforcement limits unauthorized actors from accessing sensitive information lacking correct labels.
Prevents unauthorized exposure of sensitive information by prohibiting untrusted external systems from processing or storing it.
By enforcing authorization matching prior to sharing, the control reduces the risk of exposing sensitive information to unauthorized actors.
Review and removal of nonpublic information from publicly accessible systems directly prevents exposure of sensitive data to unauthorized actors.
Data mining protection mechanisms detect and block unauthorized bulk extraction of sensitive data, directly mitigating exposure to unauthorized actors.
Literacy training teaches users to recognize and avoid actions that result in unauthorized exposure of sensitive information.
Retaining and monitoring training records confirms personnel have completed privacy and security awareness training on handling sensitive data, reducing the chance of unauthorized exposure due to lack of knowledge.