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CVE-2021-32634

23
FAUCET Score

CVE-2021-32634 is an Unsafe Deserialization vulnerability affecting Emissary versions up to 6.4.0, a distributed workflow framework developed by the NSA. This flaw allows post-authenticated attackers to achieve Remote Code Execution via the WorkSpaceClientEnqueue.action REST endpoint. With a CVSS score of 7.2 (HIGH), exploitation is network-based and low complexity, leading to high impact on confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the vulnerability has been patched in Emissary 6.5.0, and disabling network access from untrusted sources serves as a workaround.

Impacted Technologies

VendorProductVersion(s)CPE
6.4.0CPE matchmatch criteria
cpe:2.3:a:nsa:emissary:6.4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
1.3
Impact Score
5.3
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 57th percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / NationalSecurityAgency/emissary/commit/40260b1ec1f76cc92361702cc14fa1e4388e19d7
PatchThird Party Advisory
github.com / NationalSecurityAgency/emissary/security/advisories/GHSA-m5qf-gfmp-7638
Third Party Advisory