HOMEVULNERABILITIESCVE-2017-11402
CRITICAL

CVE-2017-11402

CWE-20Published: November 20, 2017· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

An issue has been discovered on the Belden Hirschmann Tofino Xenon Security Appliance before 03.2.00. Design flaws in OPC classic and in custom netfilter modules allow an attacker to remotely activate rules on the firewall and to connect to any TCP port of a protected asset, thus bypassing the firewall. The attack methodology is a crafted OPC dynamic port shift.

NVD Source

Technical Analysis

CVE-2017-11402 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

belden2 product(s)
tofino xenon security appliance firmwaretofino xenon security appliance
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://github.com/airbus-seclab/security-advisories/blob/master/belden/tofino.txt
ADVISORYhttps://www.belden.com/hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdf
ADVISORYhttps://github.com/airbus-seclab/security-advisories/blob/master/belden/tofino.txt
ADVISORYhttps://www.belden.com/hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdf

All References (4)

→
https://github.com/airbus-seclab/security-advisories/blob/master/belden/tofino.txtThird Party Advisory
→
https://www.belden.com/hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdfVendor Advisory
→
https://github.com/airbus-seclab/security-advisories/blob/master/belden/tofino.txtThird Party Advisory
→
https://www.belden.com/hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdfVendor Advisory

Quick Facts

CVE IDCVE-2017-11402
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedNov 20, 2017

Related CVEs (CWE-20)

CVE-2012-6392
10.0
CVE-2012-3021
10.0
CVE-2012-4176
10.0
CVE-2012-3026
10.0
CVE-2012-3010
10.0
CVE-2012-4704
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-11402 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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