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CVE-2018-0666· NVD / CVE Program· CNA jpcert

Yamaha routers RT57i Rev.8.00.95 and earlier, RT58i Rev.9.01.51 and earlier, NVR500 Rev.11.00.36 and earlier, RTX810 Rev.11.01.31 and earlie

Yamaha routers RT57i Rev.8.00.95 and earlier, RT58i Rev.9.01.51 and earlier, NVR500 Rev.11.00.36 and earlier, RTX810 Rev.11.01.31 and earlier, allow an administrative user to embed arbitrary scripts to the configuration data through a certain form field of the configuration page, which may be executed on another administrative user's web browser. This is a different vulnerability from CVE-2018-0665.

MediumCVSS 6.8 · v3.0—No exploit No fix recorded
Published
Jan 9, 2019
Updated
Jun 16, 2026
EPSS
0.7% · 49th percentile
CWE
—
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Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

Affected systems

VendorProduct
yamahart57i firmware
yamahart57i
yamahart58i firmware
yamahart58i
yamahanvr500 firmware
yamahanvr500
yamahartx810 firmware
yamahartx810

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • yamaha nvr500 firmwareup to rev.11.00.36 inclusive
  • yamaha rt57i firmwareup to rev.8.00.95 inclusive
  • yamaha rt58i firmwareup to rev.9.01.51 inclusive
  • yamaha rtx810 firmwareup to rev.11.01.31 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (jpcert). Independent of NVD's CPE analysis and usually ahead of it.

  • NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION Biz Box Router N58i, and N500

    • n/aaffected
  • NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION Biz Box Router N58i, N500, NVR500, and RTX810

    • n/aaffected
  • Yamaha Corporation Yamaha Broadband VoIP Router NVR500

    • Rev.11.00.36 and earlieraffected
  • Yamaha Corporation Yamaha Broadband VoIP Router RT57i

    • Rev.8.00.95 and earlieraffected
  • Yamaha Corporation Yamaha Broadband VoIP Router RT58i

    • Rev.9.01.51 and earlieraffected
  • Yamaha Corporation Yamaha Firewall FWX120

    • Rev.11.03.25 and earlieraffected
  • Yamaha Corporation Yamaha Gigabit VPN Router RTX810

    • Rev.11.01.31 and earlieraffected

Other highest-scoring records for the same primary product.

  • CVE-2018-0665Yamaha routers RT57i Rev.8.00.95 and earlier, RT58i Rev.9.01.51 and earlier, NVR500 Rev.11.00.36 and earlier, RTX810 Rev.11.01.31 and earlie
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

All records