How severe is CVE-2021-35464?

CVE-2021-35464 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-35464?

Affected package information for CVE-2021-35464 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2021-35464?

No fixed version has been published for CVE-2021-35464 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2021-35464 actively exploited in the wild?

Yes. There are 9 known exploit references for CVE-2021-35464, including 1 documented proof-of-concept exploit on Exploit-DB and 7 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2021-35464?

CVE-2021-35464 has an EPSS (Exploit Prediction Scoring System) score of 94.4%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2021-35464 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2021-35464 (ForgeRock Access Management (AM) Core Server Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2021-11-17. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2021-35464?

CVE-2021-35464 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2021-35464?

CVE-2021-35464 affects forgerock access management; forgerock openam. Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2021-35464?

A Nuclei detection template exists for CVE-2021-35464, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2021-35464 published, and has it been updated?

CVE-2021-35464 was published on July 22, 2021 and was last updated on November 5, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2021-11-03 — agencies required to remediate by 2021-11-17 · Ransomware

CVE-2021-35464

CRITICAL

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…

Published

Jul 22, 2021

Updated

Nov 5, 2025

Affected

0 pkgs

Patched

None yet

Exploits

9 known

EPSS Exploitation Probability

via FIRST.org ↗

94.4%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

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

Affected Products

2 products · 2 configurations

Application

access managementforgerock

< 6.5.4

range

Application

openamforgerock

≥ 9.0.0 && < 14.6.3

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-50131webappsjava

ForgeRock Access Manager 14.6.3 - Remote Code Execution (RCE) (Unauthenticated)

by Photubias · Jul 16, 2021

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-35464 in your stack?

O3 detects CVE-2021-35464 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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CVSS Score

9.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

None

S:Scope

Unchanged

C:Confidentiality

High

I:Integrity

High

A:Availability

High

Raw vector

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

CWE Classification

CWE-502Deserialization of Untrusted Data

Weaponization

Timeline

First exploit

Jul 16, 2021

Disclosed

Jul 22, 2021

KEV added

Nov 3, 2021

Last updated

Nov 5, 2025

Identifiers

CVE-2021-35464

References

Exploit / PoCpacketstormsecurity.com Exploit / PoCpacketstormsecurity.com Exploit / PoCbackstage.forgerock.com Exploit / PoCpacketstormsecurity.com Exploit / PoCpacketstormsecurity.com Exploit / PoCbackstage.forgerock.com Webbugster.forgerock.org Webbugster.forgerock.org Webcisa.gov

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