HOMEVULNERABILITIESCVE-2021-22667
CRITICAL

CVE-2021-22667

CWE-798Published: February 24, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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).

NVD Source

Technical Analysis

CVE-2021-22667 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

advantech2 product(s)
bb-eswgp506-2sfp-t firmwarebb-eswgp506-2sfp-t
Source: NVD CPE · 2 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

ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsa-21-054-02
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-593/
ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsa-21-054-02
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-593/

All References (4)

→
https://us-cert.cisa.gov/ics/advisories/icsa-21-054-02Mitigation · Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-21-593/Third Party Advisory · VDB Entry
→
https://us-cert.cisa.gov/ics/advisories/icsa-21-054-02Mitigation · Third Party Advisory · US Government Resource
→
https://www.zerodayinitiative.com/advisories/ZDI-21-593/Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-22667
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-798
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 24, 2021

Related CVEs (CWE-798)

CVE-2025-20309
10.0
CVE-2025-7503
10.0
CVE-2026-45336
10.0
CVE-2026-22769
KEV10.0
CVE-2026-45631
10.0
CVE-2026-13768
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-22667 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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