CVE-2019-18231Network attack vector

Credential disclosure via cleartext HTTP login

Published Mar 17, 2021 · Updated Aug 5, 2024

Cleartext transmission of sensitive information in Advantech SPECTRE RT 5.1.3 and earlier allows remote attackers to intercept login credentials via LAN HTTP. The web-management interface uses unencrypted HTTP with Basic authentication, sending usernames and passwords without encryption. The management interface is not exposed over cellular WAN by default, so an attacker must reach the device on its LAN; intercepted credentials disclose accounts but do not by themselves alter router configuration.

CVSS severity7.5
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission of sensitive information in Advantech SPECTRE RT 5.1.3 and earlier allows remote attackers to intercept login credentials via LAN HTTP. The web-management interface uses unencrypted HTTP with Basic authentication, sending usernames and passwords without encryption. The management interface is not exposed over cellular WAN by default, so an attacker must reach the device on its LAN; intercepted credentials disclose accounts but do not by themselves alter router configuration.

The record

CVE
CVE-2019-18231
Published
Mar 17, 2021
Updated
Aug 5, 2024
Vendor
Advantech
Product
SPECTRE RT
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=Versions 5.1.3 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Advantech · SPECTRE RTversion=Versions 5.1.3 and prior

Published CVSS scores

9.8AdvantechCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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