CVE-2025-66486Network attack vector

Browser-context code execution via injected HTML

Published Apr 1, 2026 · Updated Apr 1, 2026

HTML injection in IBM Aspera Shares 1.9.9 through 1.11.0 allows remote authenticated users to execute HTML in another user's browser. IBM has not published the affected input field or the server-side operation that fails to neutralize injected HTML. The attack requires high-privileged access and a victim to view the crafted content, which then runs within the hosting site's browser context.

CVSS severity4.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in IBM Aspera Shares 1.9.9 through 1.11.0 allows remote authenticated users to execute HTML in another user's browser. IBM has not published the affected input field or the server-side operation that fails to neutralize injected HTML. The attack requires high-privileged access and a victim to view the crafted content, which then runs within the hosting site's browser context.

The record

CVE
CVE-2025-66486
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
IBM
Product
IBM Aspera Shares
Classifications
CWE-80
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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=1.9.9 <=1.11.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

IBM · IBM Aspera Sharesversion=1.9.9 <=1.11.0

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.8IBM CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

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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