CVE-2026-27490Network attack vector

Unauthenticated image disclosure via 24-bit secrets

Published Aug 21, 2026 · Updated Aug 25, 2026

Insufficient entropy in inline-image access controls in Combodo iTop before 3.2.3 allows remote attackers to read protected images. The upload paths in pages/ajax.render.php generate attachment secrets with mt_rand over only 24 bits, and DownloadDocument accepts the supplied secret to authorize retrieval. No authentication or user interaction is required; brute-forcing the small token space exposes only inline-image contents reachable through this secret-based path.

CVSS severity7.5
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in inline-image access controls in Combodo iTop before 3.2.3 allows remote attackers to read protected images. The upload paths in pages/ajax.render.php generate attachment secrets with mt_rand over only 24 bits, and DownloadDocument accepts the supplied secret to authorize retrieval. No authentication or user interaction is required; brute-forcing the small token space exposes only inline-image contents reachable through this secret-based path.

The record

CVE
CVE-2026-27490
Published
Aug 21, 2026
Updated
Aug 25, 2026
Vendor
Combodo
Product
iTop
Classifications
CWE-331, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=< 3.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Combodo · iTopversion=< 3.2.3

Published CVSS scores

7.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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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-331Insufficient Entropy
T1190Exploit Public-Facing Application

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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