CVE-2023-26359
Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution
- Critical 9.8
- Exploited: added to CISA KEV 21 Aug 2023
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.
Key facts
- Published
- 23 Mar 2023
- Last changed
- 21 Oct 2025
- Assigned by
- adobe
- KEV added
- 21 Aug 2023
- KEV fix due
- 11 Sep 2023
- EPSS
- 16.988% likely to be exploited in the next 30 days, higher than 97.119% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom the CNA (adobe)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Adobe | ColdFusion |
|
Timeline
- 23 Mar 2023 Published
- 21 Aug 2023 CVE-2023-26359 added to CISA KEV
- 21 Aug 2023 Added to the CISA KEV catalogue