CVE-2026-66249

Session-cookie disclosure via missing Secure attribute

Published Oct 1, 2026 · Updated Oct 1, 2026

Missing Secure cookie attribute in HCL iControl 4.5.0 allows man-in-the-middle attackers to read session cookies over HTTP. The application's session-cookie response omits the Secure flag, so browsers can send those cookies on unencrypted requests to the same host. Interception requires an HTTP request carrying the cookie and a network position on that path; an HTTPS-only deployment does not expose this transmission path.

CVSS severityUnavailable
Unscored
EPSS probability0.10%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing Secure cookie attribute in HCL iControl 4.5.0 allows man-in-the-middle attackers to read session cookies over HTTP. The application's session-cookie response omits the Secure flag, so browsers can send those cookies on unencrypted requests to the same host. Interception requires an HTTP request carrying the cookie and a network position on that path; an HTTPS-only deployment does not expose this transmission path.

The record

CVE
CVE-2026-66249
Published
Oct 1, 2026
Updated
Oct 1, 2026
Vendor
HCL Software
Product
HCL iControl
Classifications
T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 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=v4.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

HCL Software · HCL iControlversion=v4.5.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1040Network Sniffing

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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