CVE-2019-4393Network attack vector

Unauthenticated authorization attempts without rate limits

Published Apr 7, 2020 · Updated Aug 4, 2024

Improper attempt limiting in HCL AppScan Standard 9.0.3.14 and earlier allows remote attackers to submit repeated authorization attempts. HCL has not published the affected authorization interface or the operation that fails to restrict repeated attempts. Network reachability is sufficient and no authentication is required, but the resulting access and downstream impact remain unspecified.

CVSS severity9.8
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper attempt limiting in HCL AppScan Standard 9.0.3.14 and earlier allows remote attackers to submit repeated authorization attempts. HCL has not published the affected authorization interface or the operation that fails to restrict repeated attempts. Network reachability is sufficient and no authentication is required, but the resulting access and downstream impact remain unspecified.

The record

CVE
CVE-2019-4393
Published
Apr 7, 2020
Updated
Aug 4, 2024
Vendor
HCL Software
Product
HCL AppScan Standard
Classifications
CWE-307, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=HCL AppScan Standard Edition 9.0.3.14 and below

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL AppScan Standardversion=HCL AppScan Standard Edition 9.0.3.14 and below

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/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
T1110.001Password Guessing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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