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PatchSiren cyber security CVE debrief

CVE-2018-4939 Adobe CVE debrief

CVE-2018-4939 is an Adobe ColdFusion deserialization of untrusted data vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. Because it is marked as known exploited, organizations running ColdFusion should treat remediation as a priority and apply vendor-recommended updates.

Vendor
Adobe
Product
ColdFusion
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Adobe ColdFusion administrators, application owners, vulnerability management teams, and security operations teams responsible for internet-facing or business-critical ColdFusion deployments.

Technical summary

The provided record identifies this issue as a deserialization of untrusted data vulnerability in Adobe ColdFusion. CISA’s KEV entry confirms known exploitation and directs defenders to apply updates per vendor instructions. The supplied record does not include CVSS scoring or additional exploitation details.

Defensive priority

High. KEV inclusion means there is confirmed exploitation in the wild, so affected ColdFusion environments should be prioritized for patching and validation.

Recommended defensive actions

  • Apply updates per vendor instructions as soon as possible.
  • Inventory all Adobe ColdFusion deployments, including test and legacy systems.
  • Prioritize remediation for internet-facing or externally reachable instances.
  • Verify patch status after remediation and confirm the vulnerable version is no longer present.
  • Use the CISA KEV catalog and NVD/CVE records to validate tracking and remediation status.

Evidence notes

The supplied source corpus includes a CISA KEV record for Adobe ColdFusion stating the vulnerability is known exploited, with dateAdded 2021-11-03 and dueDate 2022-05-03, and the required action is to apply updates per vendor instructions. Official reference links provided in the corpus include CVE.org, NVD, and the CISA KEV catalog.

Official resources

CISA added CVE-2018-4939 to the Known Exploited Vulnerabilities catalog on 2021-11-03 and set a remediation due date of 2022-05-03. The supplied record is dated 2021-11-03.