No exploitation reported

CVE-2020-12493

No exploitation reported by the sources we read.

Published2020-05-29
WeaknessCWE-284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An open port used for debugging in SWARCOs CPU LS4000 Series with versions starting with G4... grants root access to the device without access control via network. A malicious user could use this vulnerability to get access to the device and disturb operations with connected devices.

Timeline

dates in UTC

2020-05-2918:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-12493?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-12493?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Swarco cpu ls4000 firmware

Branch	Affected	Fixed in	Source
—	= g4	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-20-154-06 CISA1 known affected
SWARCO CPU LS4000
CPU LS4000: All OS versions starting with G4

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-20-154-06 · 1 productSWARCO TRAFFIC SYSTEMS released a patch to fix the vulnerability and close the port. Please contact SWARCO TRAFFIC SYSTEMS for further information.
Mitigation from the vendor CISA ICSA-20-154-06 · 1 productCERT@VDE published VDE-2020-016 regarding this vulnerability.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.110read 2026-10-23
NVDCVSS 3.110read 2026-10-23
NVDCVSS 2.010read 2026-10-23
CNAweakness (CWE)CWE-284read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published: 2020-05-29
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-12493?

Is CVE-2020-12493 actively exploited?

Active exploitation of CVE-2020-12493 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-12493?

CVE-2020-12493 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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