Is CVE-2018-4939 known to be exploited?

Yes. CVE-2018-4939 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 16 public proof-of-concept repositories are indexed.

Vulnerability in Adobe Coldfusion Update 5 And Earlier Versions, 11 13 Versions

CVE-2018-4939

Adobe ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions have an exploitable Deserialization of Untrusted Data vulnerability. Successful exploitation could lead to arbitrary code execution.

EPSS: 0.505 (97.9th percentile) — read the EPSS interpretation.

Affected products

N/a Adobe Coldfusion Update 5 And Earlier Versions, 11 13 Versions — versions Adobe ColdFusion ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

helpx.adobe.com/security/products/coldfusion/apsb18-14.html (x_refsource_MISC)
103718 (vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2018-4939?: CVE-2018-4939 is a vulnerability in Adobe Coldfusion Update 5 And Earlier Versions, 11 13 Versions. Published 2018-05-19.
Is CVE-2018-4939 known to be exploited?: Yes. CVE-2018-4939 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 16 public proof-of-concept repositories are indexed.