How severe is CVE-2023-38555?

CVE-2023-38555 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-38555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-38555?

CVE-2023-38555 primarily affects Fujitsu Si-r 30b Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-38555?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-38555 published?

CVE-2023-38555 was published on 2023-07-26 and last updated on 2026-06-17.

CVE-2023-38555

CVE-2023-38555 is a high-severity vulnerability in Fujitsu Si-r 30b Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Fujitsu Si-r 30b Firmware
Published: 2023-07-26
Last modified: 2026-06-17

Description

Authentication bypass vulnerability in Fujitsu network devices Si-R series and SR-M series allows a network-adjacent unauthenticated attacker to obtain, change, and/or reset configuration settings of the affected products. Affected products and versions are as follows: Si-R 30B all versions, Si-R 130B all versions, Si-R 90brin all versions, Si-R570B all versions, Si-R370B all versions, Si-R220D all versions, Si-R G100 V02.54 and earlier, Si-R G200 V02.54 and earlier, Si-R G100B V04.12 and earlier, Si-R G110B V04.12 and earlier, Si-R G200B V04.12 and earlier, Si-R G210 V20.52 and earlier, Si-R G211 V20.52 and earlier, Si-R G120 V20.52 and earlier, Si-R G121 V20.52 and earlier, and SR-M 50AP1 all versions.

Frequently asked questions

What is CVE-2023-38555?: Authentication bypass vulnerability in Fujitsu network devices Si-R series and SR-M series allows a network-adjacent unauthenticated attacker to obtain, change, and/or reset configuration settings of the affected products. Affected products and versions are as follows: Si-R 30B all versions, Si-R 130B all versions, Si-R 90brin all versions, Si-R570B all versions, Si-R370B all versions, Si-R220D all versions, Si-R G100 V02.54 and earlier, Si-R G200 V02.54 and earlier, Si-R G100B V04.12 and earlier, Si-R G110B V04.12 and earlier, Si-R G200B V04.12 and earlier, Si-R G210 V20.52 and earlier, Si-R G211 V20.52 and earlier, Si-R G120 V20.52 and earlier, Si-R G121 V20.52 and earlier, and SR-M 50AP1 all versions.
How severe is CVE-2023-38555?: CVE-2023-38555 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-38555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-38555?: CVE-2023-38555 primarily affects Fujitsu Si-r 30b Firmware. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-38555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-38555 published?: CVE-2023-38555 was published on 2023-07-26 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:o:fujitsu:si-r_30b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_130b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_90brin_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r570b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r370b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r220d_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g100b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g110b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g200b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g210_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g211_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:si-r_g121_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:sr-m_50ap1_firmware:*:*:*:*:*:*:*:*

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