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## https://sploitus.com/exploit?id=PACKETSTORM:209989
# CVE-2025-56764 β€” Trivision NC-227WF
    
    ## Summary
    Trivision NC-227WF firmware 5.80 (build 20141010) login mechanism reveals whether a username exists or not by returning different error messages ("Unknown user" vs. "Wrong password"), allowing an attacker to enumerate valid usernames. Referenced CVE record has been published to the CVE List / NVD.
    
    ## Impact
    - Username enumeration enabling targeted brute-force or credential-stuffing attacks.
    - Increases risk of unauthorized access when combined with credential theft or weak passwords.
    
    ## Observed behavior / Example
    - Different error messages are returned based on username validity.
    - Example observed responses:
      - `"Unknown user"` β€” username does not exist.
      - `"Wrong password"` β€” username exists but password incorrect.
    
    ## Mitigation / Recommendations
    1. Normalize login error messages so responses do not reveal username validity.
    2. Implement proper authentication handling and reject weaker auth schemes where inappropriate.
    3. Enforce rate limiting and account lockout policies.
    4. Monitor and audit authentication attempts; rotate compromised credentials.
    
    ## References
    - [NVD Entry](https://nvd.nist.gov/vuln/detail/CVE-2025-56764)  
    - [CVE.org Entry](https://www.cve.org/CVERecord?id=CVE-2025-56764)
    
    ---
    
    # ꢌ고문
    Trivision NC-227WF νŽŒμ›¨μ–΄ 5.80 (build 20141010)의 둜그인 μ²˜λ¦¬μ—μ„œ μ‚¬μš©μžλͺ… 쑴재 여뢀에 따라 μ„œλ‘œ λ‹€λ₯Έ 였λ₯˜ λ©”μ‹œμ§€λ₯Ό λ°˜ν™˜ν•©λ‹ˆλ‹€("Unknown user" vs "Wrong password"). 이둜 인해 κ³΅κ²©μžλŠ” μœ νš¨ν•œ μ‚¬μš©μžλͺ…을 μ—΄κ±°ν•  수 μžˆμŠ΅λ‹ˆλ‹€. κ΄€λ ¨ CVE λ ˆμ½”λ“œλŠ” NVD에 κ²Œμ‹œλ˜μ—ˆμŠ΅λ‹ˆλ‹€. 
    
    ## 영ν–₯
    - μ‚¬μš©μžλͺ… λ…ΈμΆœλ‘œ μΈν•œ 무차별 λŒ€μž… 곡격 및 ν¬λ¦¬λ΄μ…œ μŠ€ν„°ν•‘ κ°€λŠ₯μ„± 증가.
    - λ…ΈμΆœλœ μ‚¬μš©μžλͺ… + μ•½ν•œ λΉ„λ°€λ²ˆν˜Έ μ‘°ν•© μ‹œ 무단 μ ‘κ·Ό μœ„ν—˜ μ¦λŒ€.
    
    ## κ΄€μ°°λœ λ™μž‘ / μ˜ˆμ‹œ
    - μ‚¬μš©μžλͺ… 쑴재 여뢀에 따라 λ°˜ν™˜λ˜λŠ” 였λ₯˜ λ©”μ‹œμ§€κ°€ 닀름:
      - `Unknown user` β€” 계정 μ—†μŒ
      - `Wrong password` β€” 계정 쑴재, λΉ„λ°€λ²ˆν˜Έ 뢈일치
    
    ## μ™„ν™” ꢌ고
    1. 둜그인 였λ₯˜ λ©”μ‹œμ§€λ₯Ό ν†΅μΌν•˜μ—¬ μ‚¬μš©μžλͺ… μœ νš¨μ„± λ…ΈμΆœμ„ 막을 것.
    2. 인증 처리 λ‘œμ§μ„ μ κ²€ν•˜μ—¬ λΆˆν•„μš”ν•œ μ•½ν•œ 인증 방식 ν—ˆμš©μ„ 차단할 것.
    3. 둜그인 μ‹œλ„μ— λŒ€ν•œ 속도 μ œν•œ 및 계정 잠금 μ •μ±… 적용.
    4. 인증 둜그 λͺ¨λ‹ˆν„°λ§ 및 μ˜μ‹¬μŠ€λŸ¬μš΄ μ‹œλ„μ— λŒ€ν•œ 쑰치, 자격증λͺ… ꡐ체.
    
    ## μ°Έκ³ 
    - [NVD 등둝 정보](https://nvd.nist.gov/vuln/detail/CVE-2025-56764)  
    - [CVE.org 등둝 정보](https://www.cve.org/CVERecord?id=CVE-2025-56764)