CVE-2021-27764Network attack vector

Sensitive-cookie disclosure via missing security attributes

Published May 6, 2022 · Updated Sep 16, 2024

Cookie attribute omission in HCL BigFix WebUI 9.0 and 10.0 allows remote attackers to obtain sensitive cookie data. The WebUI sets one or more cookies without Secure or HttpOnly, exposing cookie values to cleartext transport or client-side script access. Exploitation requires user interaction and affects confidentiality, with no reported ability to alter data or interrupt service.

CVSS severity7.4
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cookie attribute omission in HCL BigFix WebUI 9.0 and 10.0 allows remote attackers to obtain sensitive cookie data. The WebUI sets one or more cookies without Secure or HttpOnly, exposing cookie values to cleartext transport or client-side script access. Exploitation requires user interaction and affects confidentiality, with no reported ability to alter data or interrupt service.

The record

CVE
CVE-2021-27764
Published
May 6, 2022
Updated
Sep 16, 2024
Vendor
HCL Software
Product
HCL BigFix WebUI
Classifications
CWE-311, CWE-614, CWE-732, CAPEC-102, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2022CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0, 10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL BigFix WebUIversion=9.0, 10.0

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
7.4HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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-311Missing Encryption of Sensitive Data
CWE-614Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
CWE-732Incorrect Permission Assignment for Critical Resource
CAPEC-102Session Sidejacking
T1539Steal Web Session Cookie

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo