CVE-2023-40239Network attack vector

Authenticated information disclosure via external entity resolution

Published Sep 1, 2023 · Updated Oct 1, 2024

XML external entity injection in Lexmark CS310 firmware LW80.VYL.P245 and earlier allows remote authenticated users to extract device information. Lexmark identifies the flaw as XXE but does not disclose the XML-processing endpoint or parser path that resolves attacker-supplied external entities. High-privilege access to the network-reachable device is required, and the documented consequence is information disclosure only.

CVSS severity6.8
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity injection in Lexmark CS310 firmware LW80.VYL.P245 and earlier allows remote authenticated users to extract device information. Lexmark identifies the flaw as XXE but does not disclose the XML-processing endpoint or parser path that resolves attacker-supplied external entities. High-privilege access to the network-reachable device is required, and the documented consequence is information disclosure only.

The record

CVE
CVE-2023-40239
Published
Sep 1, 2023
Updated
Oct 1, 2024
Vendor
Lexmark
Product
Lexmark CS310
Classifications
CWE-611
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2023-08-25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Lexmark · Lexmark CS310version=0 <2023-08-25

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.8LexmarkCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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