CVE-2021-44638.7HighCWE-552

CVE-2021-4463: Longjing Technology BEMS API <= 1.21 Remote Arbitrary File Download

Shenzhen Longjing Technology Co. Ltd. · BEMS API

Affected: Shenzhen Longjing Technology Co. Ltd. BEMS API · Exploitation: check available, not yet exploited

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.5%probability of exploitation in the next 30 days

75th percentile

050100

Higher than 75% of scored CVEs

8.7HighCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Shenzhen Longjing Technology Co. Ltd. · BEMS APIup to and including 1.21

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
CISA KEV: Not listed
Public check: Longjing Technology BEMS API 1.21 - Unauthenticated Arbitrary File Download · nuclei template in projectdiscovery/nuclei-templates
Weakness: Files or Directories Accessible to External Parties · File and Path Handling
Published: November 2025
Band: Check available, not yet exploited, November 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2021-4463 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.