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CVE-2026-48440 – Remote Code Execution – Adobe ColdFusion 2025 (≤2025.0.11) and 2023 (≤2023.0.22)

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Summary

CVE-2026-48440 is a heap-based buffer overflow vulnerability in Adobe ColdFusion that can lead to arbitrary code execution. The flaw is remotely exploitable over the network without authentication or user interaction, though successful exploitation depends on conditions outside the attacker’s control. Adobe rates the issue with a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: A heap-based buffer overflow (CWE-122) within ColdFusion.
  • Trigger conditions: Exploitation requires an attacker-controlled input to reach the vulnerable memory-handling code path; Adobe notes the exploit is dependent on conditions beyond the attacker’s control, which raises attack complexity.
  • Attack vector: Network-based; no privileges and no user interaction are required.
  • Impact: Successful exploitation can result in arbitrary code execution, with impact to confidentiality, integrity, and availability of the affected ColdFusion server.

Affected software

  • Adobe ColdFusion 2025 — versions up to and including 2025.0.11 (fixed in 2025.0.12)
  • Adobe ColdFusion 2023 — versions up to and including 2023.0.22 (fixed in 2023.0.23)

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade Adobe ColdFusion 2025 to version 2025.0.12 or later, and ColdFusion 2023 to version 2023.0.23 or later, per Adobe Security Bulletin APSB26-90.
  • If immediate patching is not possible: Restrict network exposure of ColdFusion administration and application endpoints to trusted networks, place the server behind a web application firewall, and monitor for anomalous crashes or memory-related errors that could indicate exploitation attempts, until the patch can be applied.

References

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