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TI-2021-04059 Aliases CVE-2021-20844GHSA-gpv9-mf3p-h34x

Improper output encoding in Yamaha Corporation RTX830, NVR510, NVR700W, RTX1210

Priority LOW 27CWE-116Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00957 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Yamaha CorporationRTX830, NVR510, NVR700W, RTX1210RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, RTX1210 Rev.14.01.38 and earlier—No fix listedCNA
  • RTX830, NVR510, NVR700W, RTX1210 VendorYamaha Corporation Affected RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, RTX1210 Rev.14.01.38 and earlier Fixed in — No fix listed CNA

CPE configurations NVD · 16

CPEVersionsRoleVendor
cpe:2.3:o:yamaha:rtx830_firmware:*:*:*:*:*:*:*:*up to 15.02.17VulnerableYamaha Corporation
cpe:2.3:h:yamaha:rtx830:-:*:*:*:*:*:*:*not specified by NVDRunning onYamaha Corporation
cpe:2.3:o:yamaha:nvr510_firmware:*:*:*:*:*:*:*:*up to 15.01.18VulnerableYamaha Corporation
cpe:2.3:h:yamaha:nvr510:-:*:*:*:*:*:*:*not specified by NVDRunning onYamaha Corporation
cpe:2.3:o:yamaha:nvr700w_firmware:*:*:*:*:*:*:*:*up to 15.00.19VulnerableYamaha Corporation
cpe:2.3:h:yamaha:nvr700w:-:*:*:*:*:*:*:*not specified by NVDRunning onYamaha Corporation
cpe:2.3:o:yamaha:rtx1210_firmware:*:*:*:*:*:*:*:*up to 14.01.38VulnerableYamaha Corporation
cpe:2.3:h:yamaha:rtx1210:-:*:*:*:*:*:*:*not specified by NVDRunning onYamaha Corporation
cpe:2.3:o:ntt-west:biz_box_rtx830_firmware:*:*:*:*:*:*:*:*up to 15.02.17VulnerableNTT WEST, Inc.
cpe:2.3:h:ntt-west:biz_box_rtx830:-:*:*:*:*:*:*:*not specified by NVDRunning onNTT WEST, Inc.
  • cpe:2.3:o:yamaha:rtx830_firmware:*:*:*:*:*:*:*:* Versions up to 15.02.17 Vulnerable ·Yamaha Corporation
  • cpe:2.3:h:yamaha:rtx830:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yamaha Corporation
  • cpe:2.3:o:yamaha:nvr510_firmware:*:*:*:*:*:*:*:* Versions up to 15.01.18 Vulnerable ·Yamaha Corporation
  • cpe:2.3:h:yamaha:nvr510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yamaha Corporation
  • cpe:2.3:o:yamaha:nvr700w_firmware:*:*:*:*:*:*:*:* Versions up to 15.00.19 Vulnerable ·Yamaha Corporation
  • cpe:2.3:h:yamaha:nvr700w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yamaha Corporation
  • cpe:2.3:o:yamaha:rtx1210_firmware:*:*:*:*:*:*:*:* Versions up to 14.01.38 Vulnerable ·Yamaha Corporation
  • cpe:2.3:h:yamaha:rtx1210:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Yamaha Corporation
  • cpe:2.3:o:ntt-west:biz_box_rtx830_firmware:*:*:*:*:*:*:*:* Versions up to 15.02.17 Vulnerable ·NTT WEST, Inc.
  • cpe:2.3:h:ntt-west:biz_box_rtx830:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NTT WEST, Inc.
Show 6 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:ntt-west:biz_box_nvr510_firmware:*:*:*:*:*:*:*:*before 15.01.18VulnerableNTT WEST, Inc.
cpe:2.3:h:ntt-west:biz_box_nvr510:-:*:*:*:*:*:*:*not specified by NVDRunning onNTT WEST, Inc.
cpe:2.3:o:ntt-west:biz_box_nvr700w_firmware:*:*:*:*:*:*:*:*up to 15.00.19VulnerableNTT WEST, Inc.
cpe:2.3:h:ntt-west:biz_box_nvr700w:-:*:*:*:*:*:*:*not specified by NVDRunning onNTT WEST, Inc.
cpe:2.3:o:ntt-west:biz_box_rtx1210_firmware:*:*:*:*:*:*:*:*up to 14.01.38VulnerableNTT WEST, Inc.
cpe:2.3:h:ntt-west:biz_box_rtx1210:-:*:*:*:*:*:*:*not specified by NVDRunning onNTT WEST, Inc.
  • cpe:2.3:o:ntt-west:biz_box_nvr510_firmware:*:*:*:*:*:*:*:* Versions before 15.01.18 Vulnerable ·NTT WEST, Inc.
  • cpe:2.3:h:ntt-west:biz_box_nvr510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NTT WEST, Inc.
  • cpe:2.3:o:ntt-west:biz_box_nvr700w_firmware:*:*:*:*:*:*:*:* Versions up to 15.00.19 Vulnerable ·NTT WEST, Inc.
  • cpe:2.3:h:ntt-west:biz_box_nvr700w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NTT WEST, Inc.
  • cpe:2.3:o:ntt-west:biz_box_rtx1210_firmware:*:*:*:*:*:*:*:* Versions up to 14.01.38 Vulnerable ·NTT WEST, Inc.
  • cpe:2.3:h:ntt-west:biz_box_rtx1210:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NTT WEST, Inc.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20844
  2. 2026-10-03 Alias added: GHSA-gpv9-mf3p-h34x

References

Advisory 4

  • TI-2020-04518 Yamaha LTE VoIP Router(NVR700W firmware Rev.15.00.15 and earlier), Yamaha Gigabit VoIP… CVSS 3.1HIGH 7.5
  • TI-2021-04058 Cross-site script inclusion vulnerability in the Web GUI of RTX830 Rev.15.02.17 and… CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences