HOMEVULNERABILITIESCVE-2019-5986
HIGH

CVE-2019-5986

CWE-352Published: September 12, 2019· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

Cross-site request forgery (CSRF) vulnerability in Hikari Denwa router/Home GateWay (Hikari Denwa router/Home GateWay provided by NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION PR-S300NE/RT-S300NE/RV-S340NE firmware version Ver. 19.41 and earlier, PR-S300HI/RT-S300HI/RV-S340HI firmware version Ver.19.01.0005 and earlier, PR-S300SE/RT-S300SE/RV-S340SE firmware version Ver.19.40 and earlier, PR-400NE/RT-400NE/RV-440NE firmware version Ver.7.42 and earlier, PR-400KI/RT-400KI/RV-440KI firmware version Ver.07.00.1010 and earlier, PR-400MI/RT-400MI/RV-440MI firmware version Ver. 07.00.1012 and earlier, PR-500KI/RT-500KI firmware version Ver.01.00.0090 and earlier, RS-500KI firmware version Ver.01.00.0070 and earlier, PR-500MI/RT-500MI firmware version Ver.01.01.0014 and earlier, and RS-500MI firmware version Ver.03.01.0019 and earlier, and Hikari Denwa router/Home GateWay provided by NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION PR-S300NE/RT-S300NE/RV-S340NE firmware version Ver. 19.41 and earlier, PR-S300HI/RT-S300HI/RV-S340HI firmware version Ver.19.01.0005 and earlier, PR-S300SE/RT-S300SE/RV-S340SE firmware version Ver.19.40 and earlier, PR-400NE/RT-400NE/RV-440NE firmware version Ver.7.42 and earlier, PR-400KI/RT-400KI/RV-440KI firmware version Ver.07.00.1010 and earlier, PR-400MI/RT-400MI/RV-440MI firmware version Ver. 07.00.1012 and earlier, PR-500KI/RT-500KI firmware version Ver.01.00.0090 and earlier, and PR-500MI/RT-500MI firmware version Ver.01.01.0011 and earlier) allow remote attackers to hijack the authentication of administrators via unspecified vectors.

NVD Source

Technical Analysis

CVE-2019-5986 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

ntt-east48 product(s)
pr-s300ne firmwarepr-s300nert-s300ne firmwarert-s300nerv-s340ne firmwarerv-s340nepr-s300hi firmwarepr-s300hirt-s300hi firmwarert-s300hirv-s340hi firmwarerv-s340hi+36
ntt-west44 product(s)
pr-s300ne firmwarepr-s300nert-s300ne firmwarert-s300nerv-s340ne firmwarerv-s340nepr-s300hi firmwarepr-s300hirt-s300hi firmwarert-s300hirv-s340hi firmwarerv-s340hi+32
Source: NVD CPE · 92 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://jvn.jp/en/jp/JVN43172719/index.html
ADVISORYhttps://www.ntt-west.co.jp/kiki/support/flets/hgw/190626.html
ADVISORYhttp://jvn.jp/en/jp/JVN43172719/index.html
ADVISORYhttps://www.ntt-west.co.jp/kiki/support/flets/hgw/190626.html

All References (4)

→
http://jvn.jp/en/jp/JVN43172719/index.htmlThird Party Advisory · VDB Entry
→
https://www.ntt-west.co.jp/kiki/support/flets/hgw/190626.htmlVendor Advisory
→
http://jvn.jp/en/jp/JVN43172719/index.htmlThird Party Advisory · VDB Entry
→
https://www.ntt-west.co.jp/kiki/support/flets/hgw/190626.htmlVendor Advisory

Quick Facts

CVE IDCVE-2019-5986
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-352
CISA KEVNo
Affected2 vendor(s)
PublishedSep 12, 2019

Related CVEs (CWE-352)

CVE-2025-32642
10.0
CVE-2025-23922
10.0
CVE-2017-5145
10.0
CVE-2017-6080
9.8
CVE-2016-9866
9.8
CVE-2017-5959
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-5986 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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