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CVE-2023-40544: An attacker with access to the network where the affected devices are located could maliciously act

21
Routine
MEDIUM 5.7MITIGATE

CVE-2023-40544 is a medium-severity flaw (CVSS 5.7) affecting l206-f2g firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An attacker with access to the network where the affected devices are located could maliciously actions to obtain, via a sniffer, sensitive information exchanged via TCP communications.

Why this priority

  • No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score5.7 (Medium)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.2% (top 94%)
CISA exploited listNo
WeaknessCWE-319
Published2024-02-06
Last modified2026-06-17
Publisher (CNA): ICS-CERT · Vendor: westermo

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

westermo l206-f2g firmware MITIGATE
Affected: 4.24
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.24
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-40544?

l206-f2g firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-40544 being exploited?

CVE-2023-40544 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-40544 affect?

CVE-2023-40544 affects l206-f2g firmware. Severity is medium (CVSS 5.7). An attacker with access to the network where the affected devices are located could maliciously actions to obtain, via a sniffer, sensitive information exchanged via TCP communications.

How urgent is CVE-2023-40544?

Priority 21/100. No elevated risk signals yet.

Related CVEs

References

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