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CVE-2019-5986

27
FAUCET Score

CVE-2019-5986 is a Cross-Site Request Forgery (CSRF) vulnerability affecting numerous Hikari Denwa router/Home GateWay models from NTT East and NTT West with specific firmware versions. This high-severity vulnerability (CVSS 8.8) allows remote attackers to hijack administrator authentication through unspecified vectors, potentially leading to full compromise of the device. While the vulnerability is easily exploitable with low attack complexity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
<= 19.41CPE matchmatch criteria
cpe:2.3:o:ntt-east:pr-s300ne_firmware:*:*:*:*:*:*:*:*
<= 19.41CPE matchmatch criteria
cpe:2.3:o:ntt-east:rt-s300ne_firmware:*:*:*:*:*:*:*:*
<= 19.41CPE matchmatch criteria
cpe:2.3:o:ntt-east:rv-s340ne_firmware:*:*:*:*:*:*:*:*
<= 19.01.0005CPE matchmatch criteria
cpe:2.3:o:ntt-east:pr-s300hi_firmware:*:*:*:*:*:*:*:*
<= 19.01.0005CPE matchmatch criteria
cpe:2.3:o:ntt-east:rt-s300hi_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 54th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN43172719/index.html
Third Party AdvisoryVDB Entry
ntt-west.co.jp / kiki/support/flets/hgw/190626.html
Vendor Advisory