CVE-2025-64186Public exploitNetwork attack vector

Untrusted enclave acceptance via omitted PCR values

Published Nov 12, 2025 · Updated Nov 12, 2025

Improper enclave attestation verification in Evervault Go SDK before 1.3.2 allows attackers to make clients trust unapproved enclaves. The verifyPCRs path converted absent PCR map entries to empty strings, and Equal treated paired empty values as matches, allowing an omitted PCR8 to satisfy expectations. Applications checking only PCR8 are most exposed; in Evervault-hosted environments, exploitation also requires serving requests from specific Evervault domain names.

CVSS severity8.7
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper enclave attestation verification in Evervault Go SDK before 1.3.2 allows attackers to make clients trust unapproved enclaves. The verifyPCRs path converted absent PCR map entries to empty strings, and Equal treated paired empty values as matches, allowing an omitted PCR8 to satisfy expectations. Applications checking only PCR8 are most exposed; in Evervault-hosted environments, exploitation also requires serving requests from specific Evervault domain names.

The record

CVE
CVE-2025-64186
Published
Nov 12, 2025
Updated
Nov 12, 2025
Vendor
Evervault
Product
Evervault Go SDK
Classifications
CWE-347
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Evervault · Evervault Go SDKversion=< 1.3.2

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
8.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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