CVE-2025-9039Network attack vector

Information disclosure via off-host introspection access

Published Aug 14, 2025 · Updated Aug 14, 2025

Information disclosure in Amazon ECS Agent 0.0.3 through 1.97.0 allows remote authenticated users to read container-instance metadata. The agent's introspection access controls leave port 51678 reachable from peer instances when off-host access is enabled and security-group rules admit the traffic. Exploitation requires access from another permitted instance; disabling off-host introspection prevents the disclosure.

CVSS severity5.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Amazon ECS Agent 0.0.3 through 1.97.0 allows remote authenticated users to read container-instance metadata. The agent's introspection access controls leave port 51678 reachable from peer instances when off-host access is enabled and security-group rules admit the traffic. Exploitation requires access from another permitted instance; disabling off-host introspection prevents the disclosure.

The record

CVE
CVE-2025-9039
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
Amazon Web Services
Product
Amazon Elastic Container Service
Classifications
CWE-277, T1613
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 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=0.0.3 <1.97.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Amazon Web Services · Amazon Elastic Container Serviceversion=0.0.3 <1.97.1

Published CVSS scores

5.3AmazonCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.3AmazonCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-277Insecure Inherited Permissions
T1613Container and Resource Discovery

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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