Deserialization of Untrusted Data in emissary - CVE-2021-32634
Published: May 21, 2021 / Updated: April 7, 2026
Vulnerability identifier: #VU125041
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-32634
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: National Security Agency
Affected software:
emissary
emissary
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in the WorkSpaceClientEnqueue.action REST endpoint when processing post-authenticated requests. A remote privileged user can send a specially crafted serialized request to execute arbitrary code.
Since version 6.3.0, the endpoint is protected against CSRF attacks, which reduces the impact of the vulnerability.
How to mitigate CVE-2021-32634
Install security update from vendor's website.