CVE intelligence and bounded remediation

CVE-2023-40239 — Certain Lexmark devices (such as CS310) before 2023-08-25 allow XXE attacks, leading to information disclosure

High CVSS 7.5

Certain Lexmark devices (such as CS310) before 2023-08-25 allow XXE attacks, leading to information disclosure. The fixed firmware version is LW80.*.P246, i.e., '*' indicates that the full version specification varies across product model family, but firmware level P246 (or higher) is required to remediate the vulnerability.

Severity
High
CVSS
7.5 (3.1)
Published
2023-09-01
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-611

Affected products

  • lexmark / c2132_firmware
  • lexmark / cs310_firmware
  • lexmark / cs317_firmware
  • lexmark / cs410_firmware
  • lexmark / cs417_firmware
  • lexmark / cs510_firmware

Showing 6 representative product identities from 82 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

XML external entity and unsafe XML processing

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Check exposure

  • Inventory XML parsers used by APIs, file imports, office or image formats, identity protocols, feeds, and background jobs.
  • Determine whether document type declarations, external entities, XInclude, schemas, or network resolvers are enabled.
  • Map parser filesystem and network access and the sensitivity of documents it processes.

Remediate safely

  • Configure each parser to reject document type declarations and disable external entity, XInclude, and network resolution features.
  • Prefer a data format or hardened parser that does not support external resolution, and apply input size and depth limits.
  • Update affected XML libraries and centralize secure parser construction so callers cannot silently override it.

Authoritative sources

Complete CVE record and remediation plan

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