CVE-2019-5165Public exploitNetwork attack vector

Web authentication bypass via hostname trust comparison

Published Feb 25, 2020 · Updated Aug 4, 2024

Authentication bypass in Moxa AWK-3131A firmware 1.13 allows remote authenticated users to access protected web pages. The iw_webs local-client check compares the requester's IP address with the configured device hostname and treats a match as device-originated traffic without further verification. An attacker must first use authenticated SNMP write access to set the hostname to an attacker-controlled IP address; subsequent requests from that address receive unrestricted web access.

CVSS severity8.0
High
EPSS probability2.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in Moxa AWK-3131A firmware 1.13 allows remote authenticated users to access protected web pages. The iw_webs local-client check compares the requester's IP address with the configured device hostname and treats a match as device-originated traffic without further verification. An attacker must first use authenticated SNMP write access to set the hostname to an attacker-controlled IP address; subsequent requests from that address receive unrestricted web access.

The record

CVE
CVE-2019-5165
Published
Feb 25, 2020
Updated
Aug 4, 2024
Vendor
Moxa
Product
AWK-3131A Series
Classifications
CWE-288, CWE-287, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Moxa AWK-3131A Firmware version 1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moxa · AWK-3131A Seriesversion=Moxa AWK-3131A Firmware version 1.13

Published CVSS scores

8.0Cisco TalosCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo