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CVE-2023-23901: Improper following of a certificate's chain of trust exists in SkyBridge MB-A200 firmware Ver

38
Routine
MEDIUM 6.5REMOTEUPGRADEUPGRADE

CVE-2023-23901 is a medium-severity flaw (CVSS 6.5) affecting skybridge basic mb-a130 firmware, skybridge mb-a200 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper following of a certificate's chain of trust exists in SkyBridge MB-A200 firmware Ver. 01.00.05 and earlier, and SkyBridge BASIC MB-A130 firmware Ver. 1.4.1 and earlier, which may allow a remote unauthenticated attacker to eavesdrop on or alter the communication sent to the WebUI of the product.

Why this priority

  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.5% (top 60%)
CISA exploited listNo
WeaknessCWE-295
Published2023-05-10
Last modified2026-06-17
Publisher (CNA): JPCERT/CC · Vendor: seiko-sol

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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

seiko-sol skybridge basic mb-a130 firmware UPGRADE
Affected: <= 1.4.1
Fixed in: newer than 1.4.1
Safe to downgrade to: no unaffected older release
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.
seiko-sol skybridge mb-a200 firmware UPGRADE
Affected: <= 01.00.05
Fixed in: newer than 01.00.05
Safe to downgrade to: no unaffected older release
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-2023-23901?

skybridge basic mb-a130 firmware: upgrade to newer than 1.4.1; skybridge mb-a200 firmware: upgrade to newer than 01.00.05. Exact commands for each OS are on this page.

Is CVE-2023-23901 being exploited?

CVE-2023-23901 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-2023-23901 affect?

CVE-2023-23901 affects skybridge basic mb-a130 firmware, skybridge mb-a200 firmware. Severity is medium (CVSS 6.5). Improper following of a certificate's chain of trust exists in SkyBridge MB-A200 firmware Ver. 01.00.05 and earlier, and SkyBridge BASIC MB-A130 firmware Ver. 1.4.1 and earlier, which may allow a remote unauthenticated attacker to eavesdrop

How urgent is CVE-2023-23901?

Priority 38/100. Remotely exploitable, no login, no user action

Related CVEs

References

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