No exploitation reported

CVE-2021-22667

No exploitation reported by the sources we read.

Published2021-02-24
WeaknessCWE-798

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

BB-ESWGP506-2SFP-T versions 1.01.09 and prior is vulnerable due to the use of hard-coded credentials, which may allow an attacker to gain unauthorized access and permit the execution of arbitrary code on the BB-ESWGP506-2SFP-T (versions 1.01.01 and prior).

Timeline

dates in UTC

2021-02-2417:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22667?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22667?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Advantech bb-eswgp506-2sfp-t firmwareversion to verify

Branch	Affected	Fixed in	Source
1.1	≤ 1.01.09	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-054-02 CISA1 known affected
Advantech BB-ESWGP506-2SFP-T
BB-ESWGP506-2SFP-T industrial ethernet switches: Versions 1.01.09 and prior

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-21-054-02 · 1 productAdvantech no longer sells or maintains BB-ESWGP506-2SFP-T and considers it to be an end-of-life product.
Mitigation from the vendor CISA ICSA-21-054-02 · 1 productAdvantech recommends users replace the device with a succeeding model such as EKI-7708-4FPI.

Advisories and patches

us-cert.cisa.govMitigation

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
CNAweakness (CWE)CWE-798read 2026-10-23
NVDweakness (CWE)CWE-798read 2026-10-23
FIRST EPSSEPSS score3.7 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-02-24
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-22667?

Is CVE-2021-22667 actively exploited?

Active exploitation of CVE-2021-22667 has not been confirmed. Its EPSS score was 3.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22667?

CVE-2021-22667 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running Advantech BB-ESWGP506-2SFP-T? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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