Westermo Lynx Code Injection

published 2024-02-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-50024

cvss: 8.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

A potential attacker with access to the Westermo Lynx device may be able to execute malicious code that could affect the correct functioning of the device.

Vendor advisories

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

cisa ICSA-24-023-04 updated 2024-01-23 cvss 8.0

Westermo Lynx 206-F2G

Westermo Lynx Firmware 4.24. Westermo Lynx Model L206-F2G1
affected: mitigation “Westermo recommends following best practices for hardening, such as restricting access, disable unused services (attack surface reduction) etc., to mitigate the reported vulnerabilities.”

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

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-08-19)

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	8.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

Westermo Lynx
westermo l206-f2g1_firmware

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

cisa.gov /news-events/ics-advisories/icsa-24-023-04
third-party-advisory, us-government-resource

Sources

CVE List CVE-2023-45735
NVD CVE-2023-45735

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