What’s Vulnerable › Vulnerabilities

CVE-2022-50800: H3C SSL VPN n/a Username Enumeration via Login Script Credential Verification

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-30 · updated 2026-06-17
• Weakness: CWE-203

Description

H3C SSL VPN contains a user enumeration vulnerability that allows attackers to identify valid usernames through the 'txtUsrName' POST parameter. Attackers can submit different usernames to the login_submit.cgi endpoint and analyze response messages to distinguish between existing and non-existing accounts.

Affected products

• Hangzhou H3C Technologies H3C SSL VPN: 1.1

References

• https://www.exploit-db.com/exploits/50742
• https://www.h3c.com
• https://www.vulncheck.com/advisories/hc-ssl-vpn-na-username-enumeration-via-login-script-credential-verification
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5697.php

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