Advantech Spectre RT ERT351 Versions 5.1.3 and prior logins and passwords are transmitted in clear text form, which may allow an attacker t…

published 2021-03-17 5 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8031

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

Advantech Spectre RT ERT351 Versions 5.1.3 and prior logins and passwords are transmitted in clear text form, which may allow an attacker to intercept the request.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-054-03 updated 2021-02-23 cvss 7.5

Advantech Spectre RT Industrial Routers

Advantech Spectre RT ERT351 <= 5.1.3
affected: mitigation “For additional information, please see Advantech Security Advisory SA-2021-01-01” ep.advantech-bb.cz

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a Advantech Spectre RT ERT351

Classification

Weakness

CWE-319 Cleartext Transmission of Sensitive Information

References

ep.advantech-bb.cz /support/router-models/download/511/sa-2021-01-fw-5.1.3-and-older-en.pdf
vendor-advisory
us-cert.cisa.gov /ics/advisories/icsa-21-054-03
third-party-advisory, us-government-resource

Sources

CVE List CVE-2019-18231
NVD CVE-2019-18231

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary