CVE-2023-26359

Name: CVE-2023-26359
Creator: NVD / NIST
Published: 2023-03-23T20:15:15.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 17.94%

Last modified Jun 17, 2026

CVE-2023-26359 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.. CISA has confirmed active exploitation in the wild. EPSS estimates a 17.94% chance of exploitation in the next 30 days.

Description

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

17.94%

96.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Sep 11, 2023.

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Adobe	Coldfusion	2018
Adobe	Coldfusion	2021

References

https://helpx.adobe.com/security/products/coldfusion/apsb23-25.htmlPatch, Vendor Advisory
https://helpx.adobe.com/security/products/coldfusion/apsb23-25.htmlPatch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-26359Third Party Advisory, US Government Resource

Timeline

Published: Mar 23, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-26359?

How severe is CVE-2023-26359?

CVE-2023-26359 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 17.94% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-26359?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26359?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST