CVE-2026-64993Network attack vectorHinoki check available

Credential interception via ignored invalid certificates

Published Aug 6, 2026 · Updated Aug 6, 2026

Improper certificate validation in Dell RVTools before 4.8.1 allows remote attackers to intercept collector credentials and data. The collector accepts invalid or self-signed certificates without warning when connecting to vCenter or ESXi over HTTPS. Exploitation requires a man-in-the-middle position and user interaction with a collection, exposing credentials and permitting collected data to be altered.

CVSS severity6.8
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Improper certificate validation in Dell RVTools before 4.8.1 allows remote attackers to intercept collector credentials and data. The collector accepts invalid or self-signed certificates without warning when connecting to vCenter or ESXi over HTTPS. Exploitation requires a man-in-the-middle position and user interaction with a collection, exposing credentials and permitting collected data to be altered.

The record

CVE
CVE-2026-64993
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Dell Technologies
Product
RVTools
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record 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=0 <4.8.1 or later

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dell Technologies · RVToolsversion=0 <4.8.1 or later

Published CVSS scores

6.8DellCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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