Adobe ColdFusion Deserialization of Untrusted Data Vulnerability
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.…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)21 Aug 2023
- Exploited in EUVD (ENISA)21 Aug 2023
- Used by ransomwareno
- EPSS above 10 %17.0%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
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.
Affected products
- unspecified ≤CF2018U15, CF2021U5
- unspecified ≤None
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
-
Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 17.0%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-48356Adobe Commerce and Magento Unrestricted Upload of File with Dangerous Type Vulnerability7.5 · Rising fast
- CVE-2026-71362Adobe Commerce and Magento Incorrect Authorization Vulnerability8.8 · Actively exploited
- CVE-2026-75650Adobe Commerce and Magento Improper Neutralization of Special Elements Used in a Template Engine Vulnerability5.9 · Actively exploited
- CVE-2026-48282Adobe ColdFusion Path Traversal Vulnerability7.7 · Actively exploited
- CVE-2009-3459Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability8.5 · Actively exploited
- CVE-2026-34621Adobe Acrobat and Reader Prototype Pollution Vulnerability4.9 · Background exploitation