CVE-2021-32634 Deserialization of Untrusted Data in Emissary
An attacker with valid credentials can achieve remote code execution via unsafe deserialization in the Emissary workflow framework.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-32634?
CVE-2021-32634 is a high-severity unsafe deserialization vulnerability in NationalSecurityAgency emissary, published on 21 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2021-32634?
It affects 1 product.
Products include Nsa Emissary.
How do I fix CVE-2021-32634?
No fix has been published for CVE-2021-32634 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2021-32634 being exploited?
There is no known exploitation of CVE-2021-32634 in the wild and no public exploit code.
Other vulnerabilities in NationalSecurityAgency emissary
- CVE-2026-35580 Emissary has GitHub Actions Shell Injection via Workflow Inputs
- CVE-2026-35582 Emissary has an OS Command Injection via Unvalidated IN_FILE_ENDING / OUT_FILE_ENDING in Executrix
- CVE-2021-32094 File upload in n/a
- CVE-2021-32096 Cross-site request forgery in n/a
- CVE-2021-32095 Missing authorization in n/a
Sources
Also known as GHSA-m5qf-gfmp-7638.