Unauthenticated code execution via unsafe deserialization
Published Mar 23, 2023 · Updated Oct 21, 2025
Deserialization of untrusted data in Adobe ColdFusion 2018 Update 15 and earlier and 2021 Update 5 and earlier allows remote attackers to execute code. Adobe has not published the affected request handler, serialized input format, or code path that deserializes attacker-controlled data. Network access is sufficient and no user interaction is required; successful exploitation executes code with the ColdFusion process user's privileges.
Summary
What happened
Deserialization of untrusted data in Adobe ColdFusion 2018 Update 15 and earlier and 2021 Update 5 and earlier allows remote attackers to execute code. Adobe has not published the affected request handler, serialized input format, or code path that deserializes attacker-controlled data. Network access is sufficient and no user interaction is required; successful exploitation executes code with the ColdFusion process user's privileges.
The record
- CVE
- CVE-2023-26359
- Published
- Mar 23, 2023
- Updated
- Oct 21, 2025
- Vendor
- Adobe
- Product
- ColdFusion
- Classifications
- CWE-502, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 23, 2023CVE publishedPublication date reported by the CVE source.
- Aug 21, 2023Exploitation reportedCISA Known Exploited Vulnerabilities catalog entry for CVE-2023-26359
- Oct 21, 2025Record 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.
- Affected versionversion=unspecified <=CF2018U15, CF2021U5
- Affected versionversion=unspecified <=None
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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.
Reported exploitation
- CISA Known Exploited Vulnerabilities catalog entry for CVE-2023-26359known exploited catalog
Technologies
Your stack
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Your stack
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