What’s Vulnerable › Vulnerabilities

CVE-2021-32634: Deserialization of Untrusted Data in Emissary

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-21 · updated 2026-06-17
• Weakness: CWE-502

Description

Emissary is a distributed, peer-to-peer, data-driven workflow framework. Emissary 6.4.0 is vulnerable to Unsafe Deserialization of post-authenticated requests to the [`WorkSpaceClientEnqueue.action`](https://github.com/NationalSecurityAgency/emissary/blob/30c54ef16c6eb6ed09604a929939fb9f66868382/src/main/java/emissary/server/mvc/internal/WorkSpaceClientEnqueueAction.java) REST endpoint. This issue may lead to post-auth Remote Code Execution. This issue has been patched in version 6.5.0. As a workaround, one can disable network access to Emissary from untrusted sources.

Affected products

• NationalSecurityAgency emissary: 6.4.0

References

• https://github.com/NationalSecurityAgency/emissary/commit/40260b1ec1f76cc92361702cc14fa1e4388e19d7
• https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-m5qf-gfmp-7638
• https://github.com/NationalSecurityAgency/emissary/commit/40260b1ec1f76cc92361702cc14fa1e4388e19d7
• https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-m5qf-gfmp-7638

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