An issue has been discovered on the Belden Hirschmann Tofino Xenon Security Appliance before 03.2.00.

published 2017-11-20 8y ago modified 2026-06-17 4mo ago also EUVD-2017-3027

cvss: 6.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

An issue has been discovered on the Belden Hirschmann Tofino Xenon Security Appliance before 03.2.00. An incomplete firmware signature allows a local attacker to upgrade the equipment (kernel, file system) with unsigned, attacker-controlled, data. This occurs because the appliance_config file is signed but the .tar.sec file is unsigned.

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Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.8	CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-347 Improper Verification of Cryptographic Signature

References

belden.com /hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdf
vendor-advisory
github.com /airbus-seclab/security-advisories/blob/master/belden/tofino.txt
third-party-advisory

Sources

CVE List CVE-2017-11400
NVD CVE-2017-11400

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