Security readout for executives and security teams
Plain-English summary
CVE-2022-50800 lets an unauthenticated attacker tell whether usernames exist on H3C SSL VPN by observing login response differences. This does not directly grant access, but it can support password spraying, phishing, and targeted account attacks against remote-access infrastructure.
Executive priority
Prioritize if H3C SSL VPN is internet-facing or protects sensitive remote access. The flaw helps attackers build valid user lists, increasing risk from credential attacks, but it is not described as direct system compromise.
Technical view
The issue is a CWE-203 observable discrepancy in H3C SSL VPN 1.1. The login_submit.cgi credential verification path reportedly responds differently based on the txtUsrName POST parameter, allowing username enumeration over the network without authentication. CVSS is 7.5, reflecting high confidentiality impact and low attack complexity.
Likely exposure
Organizations using H3C SSL VPN 1.1, especially internet-facing VPN portals, are the likely exposed population. The provided sources do not identify additional affected versions or products.
Exploitation context
A public ExploitDB entry and third-party disclosures exist. The source bundle does not show CISA KEV listing or confirmed active exploitation. Treat this as publicly documented and easy to validate, but not proven exploited in the wild from the provided evidence.
Researcher notes
Evidence consistently describes username enumeration through differing login responses. Public references include an exploit listing, but sources do not provide a vendor patch statement or active exploitation confirmation. Avoid broad version assumptions beyond H3C SSL VPN 1.1.
Mitigation direction
- Check H3C guidance for a fixed version or vendor workaround.
- Limit public access to the SSL VPN portal where operationally possible.
- Monitor VPN login activity for enumeration-like patterns and repeated username attempts.
- Disable unused accounts and review externally exposed account naming conventions.
- Apply compensating authentication controls if supported by the deployed VPN configuration.
Validation and detection
- Inventory H3C SSL VPN deployments and confirm whether version 1.1 is present.
- Identify whether the VPN login portal is exposed to the internet.
- Review logs for repeated login_submit.cgi attempts across many usernames.
- In authorized testing, compare login behavior for known valid and invalid test accounts.
- Track vendor and advisory sources for patch or workaround updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-203: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-50800 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50742CVE reference · exploit
- H3C Official Product HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2022-5697)CVE reference · third-party-advisory
- VulnCheck Advisory: H3C SSL VPN n/a Username Enumeration via Login Script Credential VerificationCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Observable Discrepancy
Observable Discrepancy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.