What is the CVSS score of CVE-2021-21740?

CVE-2021-21740 has a CVSS 3.1 base score of 2.4 (Low). CVSS vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.4%.

Zxhn H2640 Firmware CVE-2021-21740

LOW

Improper Link Resolution Before File Access (CWE-59)

2021-08-09 psirt@zte.com.cn

Zte Information Disclosure Zxhn H2640 Firmware

2.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

2.4 LOW

AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Aug 09, 2021 - 16:15 nvd

LOW 2.4

DescriptionNVD

There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. The attacker could insert the USB disk with the symbolic link into the residential gateway, and access unauthorized directory information through the symbolic link, causing information leak.

AnalysisAI

There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. Rated low severity (CVSS 2.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-59. There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. The attacker could insert the USB disk with the symbolic link into the residential gateway, and access unauthorized directory information through the symbolic link, causing information leak. Affected products include: Zte Zxhn H2640 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.