CVE-2025-0500Network attack vector

Session access via improper certificate validation

Published Jan 15, 2025 · Updated Oct 14, 2025

Improper certificate validation in affected AWS native clients allows man-in-the-middle attackers to access remote DCV sessions. The clients incorrectly validate a connection certificate; AWS has not disclosed the specific certificate check or code path. Exploitation requires control of the communication path and a user-initiated client connection, exposing access to that remote session.

CVSS severity7.7
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in affected AWS native clients allows man-in-the-middle attackers to access remote DCV sessions. The clients incorrectly validate a connection certificate; AWS has not disclosed the specific certificate check or code path. Exploitation requires control of the communication path and a user-initiated client connection, exposing access to that remote session.

The record

CVE
CVE-2025-0500
Published
Jan 15, 2025
Updated
Oct 14, 2025
Vendor
Amazon Web Services
Product
Amazon WorkSpaces Applications Client
Classifications
CWE-295, CAPEC-94, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 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=1.1.1025 <1.1.1332

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Amazon Web Services · Amazon WorkSpaces Applications Clientversion=1.1.1025 <1.1.1332
Amazon Web Services · Amazon DCV Clientversion=0 <2023.1.6703; version=2020.2.2078 <2023.1.6703; version=2020.2.7459 <2023.1.9127
Amazon Web Services · Amazon WorkSpaces Clientversion=2023.0 <2024.2; version=5.0.0 <5.21.0; version=5.5.0 <5.21.0

Published CVSS scores

7.7AmazonCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1AmazonCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CAPEC-94Man in the Middle Attack
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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