Vulnerability Monitor

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CVE-2021-20844


Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.7, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 16 products from yamaha, from yamaha, from yamaha and 13 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-11-24T16:15:13.280

Last Modified

2024-11-21T05:47:16.087

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.7 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

6.8

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-116

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System yamaha rtx830_firmware ≤ 15.02.17 Yes
Hardware yamaha rtx830 - No
Operating System yamaha nvr510_firmware ≤ 15.01.18 Yes
Hardware yamaha nvr510 - No
Operating System yamaha nvr700w_firmware ≤ 15.00.19 Yes
Hardware yamaha nvr700w - No
Operating System yamaha rtx1210_firmware ≤ 14.01.38 Yes
Hardware yamaha rtx1210 - No
Operating System ntt-west biz_box_rtx830_firmware ≤ 15.02.17 Yes
Hardware ntt-west biz_box_rtx830 - No
Operating System ntt-west biz_box_nvr510_firmware < 15.01.18 Yes
Hardware ntt-west biz_box_nvr510 - No
Operating System ntt-west biz_box_nvr700w_firmware ≤ 15.00.19 Yes
Hardware ntt-west biz_box_nvr700w - No
Operating System ntt-west biz_box_rtx1210_firmware ≤ 14.01.38 Yes
Hardware ntt-west biz_box_rtx1210 - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For yamaha's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.