CVE-2021-35464

KEVRansomware UseForgeRock Access Management (AM) Core Server Remote Code Execution Vulnerability

Description

ForgeRock Access Management (AM) Core Server allows an attacker who sends a specially crafted HTTP request to one of three endpoints (/ccversion/Version, /ccversion/Masthead, or /ccversion/ButtonFrame) to execute code in the context of the current user (unless ForgeRock AM is running as root user, which the vendor does not recommend).

ForgeRock AM server before 7.0 has a Java deserialization vulnerability in the jato.pageSession parameter on multiple pages. The exploitation does not require authentication, and remote code execution can be triggered by sending a single crafted /ccversion/* request to the server. The vulnerability exists due to the usage of Sun ONE Application Framework (JATO) found in versions of Java 8 or earlier

CVSS 3.1 vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

PublishedJul 22, 2021

Last modifiedJun 17, 2026

Added to KEVNov 3, 2021

Remediation dueNov 17, 2021

References

packetstormsecurity.com/files/163486/ForgeRock-OpenAM-Jato-Java-Deserialization.htmlExploitThird Party Advisory
packetstormsecurity.com/files/163525/ForgeRock-Access-Manager-OpenAM-14.6.3-Remote-Code-Execution.htmlExploitThird Party Advisory
backstage.forgerock.com/knowledge/kb/article/a47894244ExploitPermissions Required
bugster.forgerock.orgBroken Link
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35464US Government Resource

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited and used by ransomware crews. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1806 days
Ransomware: Used in known ransomware campaigns
CVSS: 9.8 CRITICAL
EPSS (30-day exploit probability): 100.0% · top 1% of all CVEs
Weakness: CWE-502
Attack vector: Network, remotely reachable
Preconditions: No privileges and no user interaction

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.