How severe is CVE-2023-54337?

CVE-2023-54337 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-54337 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-54337?

CVE-2023-54337 affects Sysax Multi Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-54337?

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

Does CVE-2023-54337 have an EU (EUVD) identifier?

Yes. CVE-2023-54337 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2586.

When was CVE-2023-54337 published?

CVE-2023-54337 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2023-54337

CVE-2023-54337 is a critical-severity vulnerability in Sysax Multi Server with a CVSS 3.x base score of 9.1. 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-1284.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2586
Weakness: CWE-1284
Affected product: Sysax Multi Server
Published: 2026-01-13
Last modified: 2026-06-17

Description

Sysax Multi Server 6.95 contains a denial of service vulnerability in the administrative password field that allows attackers to crash the application. Attackers can overwrite the password field with 800 bytes of repeated characters to trigger an application crash and disrupt server functionality.

Frequently asked questions

What is CVE-2023-54337?: Sysax Multi Server 6.95 contains a denial of service vulnerability in the administrative password field that allows attackers to crash the application. Attackers can overwrite the password field with 800 bytes of repeated characters to trigger an application crash and disrupt server functionality.
How severe is CVE-2023-54337?: CVE-2023-54337 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-54337 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-54337?: CVE-2023-54337 affects Sysax Multi Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-54337?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-54337 have an EU (EUVD) identifier?: Yes. CVE-2023-54337 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2586.
When was CVE-2023-54337 published?: CVE-2023-54337 was published on 2026-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sysax:multi_server:6.95:*:*:*:*:*:*:*

More vulnerabilities in Sysax Multi Server

CVE-2012-10060 — Critical (CVSS 9.8): Sysax Multi Server versions prior to 5.55 contain a stack-based buffer overflow in its SSH service. When a remote…
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CVE-2020-13229 — High (CVSS 8.8): An issue was discovered in Sysax Multi Server 6.90. A session can be hijacked if one observes the sid value in any…
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CVE-2024-53458 — High (CVSS 7.5): Sysax Multi Server 6.99 is vulnerable to a denial of service (DoS) condition when processing specially crafted SSH…
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