CVE-2023-26314Public exploitNetwork attack vector

Code execution via unsandboxed MIME handler

Published Feb 22, 2023 · Updated May 20, 2026

Code execution in Debian Mono before 6.8.0.105+dfsg-3.3 allows remote attackers to run arbitrary code through a crafted file. Two desktop entries register application/x-ms-dos-executable with the unsandboxed Mono CLR and launch matched files without another prompt. Exploitation requires the user to open a downloaded file or attachment, and the payload runs with that user's privileges.

CVSS severity8.8
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Debian Mono before 6.8.0.105+dfsg-3.3 allows remote attackers to run arbitrary code through a crafted file. Two desktop entries register application/x-ms-dos-executable with the unsandboxed Mono CLR and launch matched files without another prompt. Exploitation requires the user to open a downloaded file or attachment, and the payload runs with that user's privileges.

The record

CVE
CVE-2023-26314
Published
Feb 22, 2023
Updated
May 20, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 22, 2023CVE publishedPublication date reported by the CVE source.
  2. May 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1204.002User Execution: Malicious File

Public exploit references

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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