CVE-2021-26909Network attack vector

Sensitive file disclosure via guessable S3 URLs

Published Apr 23, 2021 · Updated Sep 16, 2024

Information disclosure in Automox Agent before 31 allows remote attackers to download sensitive files from a guessable S3 URL. The agent stored uploaded policy files under a six-digit policy identifier and filename at a public AWS S3 path without sufficient masking or expiration. No authentication or user interaction is required; successful guessing exposes internal files that identify deployed security products and support endpoint impersonation.

CVSS severity3.7
Low
EPSS probability0.73%
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 Automox Agent before 31 allows remote attackers to download sensitive files from a guessable S3 URL. The agent stored uploaded policy files under a six-digit policy identifier and filename at a public AWS S3 path without sufficient masking or expiration. No authentication or user interaction is required; successful guessing exposes internal files that identify deployed security products and support endpoint impersonation.

The record

CVE
CVE-2021-26909
Published
Apr 23, 2021
Updated
Sep 16, 2024
Vendor
Automox
Product
Automox Agent
Classifications
CWE-330, CWE-284, CWE-497, T1530
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=30 <30

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Automox · Automox Agentversion=30 <30

Published CVSS scores

3.7Rapid7, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
CWE-284Improper Access Control
CWE-497Exposure of Sensitive System Information to an Unauthorized Control Sphere
T1530Data from Cloud Storage

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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