CVE-2020-37228Public exploitNetwork attack vector

Automated password guessing via exposed CAPTCHA codes

Published May 16, 2026 · Updated May 16, 2026

CAPTCHA bypass in iDS6 DSSPro Digital Signage System 6.2 allows remote attackers to automate password guessing via its login endpoint. The unauthenticated Pages/login!autoLoginVerifyCode route returns the CAPTCHA value in a JSON message, which can then be submitted to Pages/login!userValidate with each credential guess. Network access to the web interface is sufficient; account compromise still requires a valid username and password guess.

CVSS severity9.3
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CAPTCHA bypass in iDS6 DSSPro Digital Signage System 6.2 allows remote attackers to automate password guessing via its login endpoint. The unauthenticated Pages/login!autoLoginVerifyCode route returns the CAPTCHA value in a JSON message, which can then be submitted to Pages/login!userValidate with each credential guess. Network access to the web interface is sufficient; account compromise still requires a valid username and password guess.

The record

CVE
CVE-2020-37228
Published
May 16, 2026
Updated
May 16, 2026
Vendor
Guangzhou Yeroo Tech Co., Ltd.
Product
iDS6 DSSPro Digital Signage System
Classifications
CWE-307, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2026CVE publishedPublication date reported by the CVE source.
  2. May 16, 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=6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Guangzhou Yeroo Tech Co., Ltd. · iDS6 DSSPro Digital Signage Systemversion=6.2

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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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 exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1110.001Password Guessing

Public exploit references

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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