CVE-2023-54337
Sysax Multi Server 6.95
Raw vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-54337 is a medium-severity Improper Validation of Specified Quantity in Input (CWE-1284) vulnerability in Sysax Multi Server. Its CVSS base score is 5.1 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique OS Credential Dumping (T1003); ranked at the 44th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2023-54337 is a denial-of-service vulnerability affecting Sysax Multi Server version 6.95, specifically in the administrative password field. The flaw allows attackers to crash the application by overwriting the password field with 800 bytes of repeated characters, leading to disruption of server functionality. It has been assigned a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H) and maps to CWE-1284 (Improper Validation of Specified Quantity in Input).
The vulnerability can be exploited remotely by unauthenticated attackers over the network with low complexity and no user interaction required. Successful exploitation triggers an application crash, resulting in high impacts to integrity and availability while sparing confidentiality. This disrupts server operations, potentially denying service to legitimate users.
Advisories from Vulncheck and a proof-of-concept on Exploit-DB detail the issue and demonstrate the attack using repeated characters in the password field. The vendor site at sysax.com is referenced, though no specific patches or mitigations are detailed in available information. Security practitioners should monitor for updates and consider restricting access to administrative interfaces.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-2586
Vulnerability Data
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…
more
disrupt server functionality.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V6.7.2V1.4.2V2.2.1V2.2.2
Mitigating Controls (NIST 800-53 r5) AI
SI-10 requires validity checks on information inputs, directly stopping acceptance of malformed quantities before they can be used.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require proper quantity/length validation in input handling.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.