CVE-2021-27782Network attack vector

Account compromise via unrestricted password guessing

Published Jan 19, 2023 · Updated Apr 2, 2025

Improper login-attempt restriction in HCL BigFix Mobile 2.0.x allows remote attackers to brute-force Admin and Config UI passwords. The Admin and Config UI authentication paths continue accepting password guesses instead of locking an account after multiple invalid attempts. Network reachability to either login interface is required; a successful guess exposes the functions and data authorized to the compromised account.

CVSS severity5.4
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper login-attempt restriction in HCL BigFix Mobile 2.0.x allows remote attackers to brute-force Admin and Config UI passwords. The Admin and Config UI authentication paths continue accepting password guesses instead of locking an account after multiple invalid attempts. Network reachability to either login interface is required; a successful guess exposes the functions and data authorized to the compromised account.

The record

CVE
CVE-2021-27782
Published
Jan 19, 2023
Updated
Apr 2, 2025
Vendor
HCLSoftware
Product
HCL BigFix Mobile
Classifications
CWE-307, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2025Record 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=2.0.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL BigFix Mobileversion=2.0.x

Published CVSS scores

5.4HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
7.5NIST NVDCVSS: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.

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-307Improper Restriction of Excessive Authentication Attempts
T1110Brute Force

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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