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보안패치정보

Cisco 제품 보안 업데이트 권고 2026-09-03 
          	
   
    
□ 개요
 o Cisco社는 자사 제품에서 발생하는 취약점을 해결한 보안 업데이트 발표 [1]~[3]
 o 영향을 받는 버전을 사용 중인 사용자는 해결 방안에 따라 최신 버전으로 업데이트 권고

    
□ 설명
 o Cisco IOS XR Software에서 발생하는 Improper Control of a Resource Through its Lifetime 취약점(CVE-2026-20274) [1][4]
 o Cisco IOS XR Software에서 발생하는 Incorrect Calculation 취약점(CVE-2026-20275) [1][5]
 o Cisco IOS XR Software에서 발생하는 Insufficient Control Flow Management 취약점(CVE-2026-20276) [1][6]
 o Cisco IOS XR Software에서 발생하는 Protection Mechanism Failure 취약점(CVE-2026-20277) [1][7]
 o Cisco IOS XR Software에서 발생하는 Improper Neutralization 취약점(CVE-2026-20278) [1][8]
 o Cisco IOS XR Software에서 발생하는 Improper Access Control 취약점(CVE-2026-20279) [1][9]
 o Cisco IOS XR Software에서 발생하는 Improper Check or Handling of Exceptional Conditions 취약점(CVE-2026-20280) [1][10]
 o Cisco BroadWorks에서 발생하는 Improper Restriction of XML External Entity Reference 취약점(CVE-2026-20320) [2][11]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Classic Buffer Overflow 취약점(CVE-2026-20337) [3][12]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Double Free 취약점(CVE-2026-20338) [3][13]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Integer Overflow or Wraparound 취약점(CVE-2026-20339) [3][14]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Stack-based Buffer Overflow 취약점(CVE-2026-20345) [3][15]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Out-of-bounds Read 취약점(CVE-2026-20346) [3][16]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Out-of-bounds Read 취약점(CVE-2026-20347) [3][17]
 o ClamAV, Cisco Secure Endpoint Connector에서 발생하는 Classic Buffer Overflow 취약점(CVE-2026-20348) [3][18]

    
□ 영향을 받는 제품 및 해결 방안
    
     
             
        취약점        제품명        영향받는 버전        해결 버전       
                   
        CVE-2026-20274        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20274        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20274        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20274        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20274        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20274        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20274        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20274        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20274        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20274        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20274        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20274        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20274        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20274        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20275        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20275        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20275        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20275        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20275        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20275        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20275        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20275        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20275        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20275        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20275        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20275        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20275        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20275        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20276        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20276        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20276        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20276        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20276        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20276        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20276        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20276        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20276        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20276        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20276        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20276        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20276        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20276        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20277        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20277        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20277        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20277        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20277        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20277        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20277        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20277        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20277        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20277        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20277        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20277        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20277        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20277        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20278        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20278        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20278        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20278        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20278        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20278        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20278        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20278        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20278        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20278        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20278        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20278        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20278        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20278        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20279        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20279        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20279        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20279        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20279        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20279        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20279        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20279        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20279        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20279        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20279        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20279        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20279        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20279        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20280        IOS XR Software        7.3        7.3.2       
       
        CVE-2026-20280        IOS XR Software        7.9        7.9.2, 7.9.21       
       
        CVE-2026-20280        IOS XR Software        7.10        7.10.2       
       
        CVE-2026-20280        IOS XR Software        7.11        7.11.2, 7.11.21       
       
        CVE-2026-20280        IOS XR Software        24.1        24.1.2       
       
        CVE-2026-20280        IOS XR Software        24.2        24.2.2, 24.2.21       
       
        CVE-2026-20280        IOS XR Software        24.3        24.3.2       
       
        CVE-2026-20280        IOS XR Software        24.4        24.4.2       
       
        CVE-2026-20280        IOS XR Software        25.1        25.1.2       
       
        CVE-2026-20280        IOS XR Software        25.2        25.2.21       
       
        CVE-2026-20280        IOS XR Software        25.4        25.4.1, 25.4.2       
       
        CVE-2026-20280        IOS XR Software        26.1        26.1.2       
       
        CVE-2026-20280        IOS XR Software        26.2        26.2.1, 26.2.2       
       
        CVE-2026-20280        IOS XR Software        26.3        26.3.1       
       
        CVE-2026-20320        BroadWorks Application Delivery Platform        RI.2026.07 미만        RI.2026.07 이상       
       
        CVE-2026-20320        BroadWorks Application Server        RI.2026.07 미만        RI.2026.07 이상       
       
        CVE-2026-20320        BroadWorks Profile Server        RI.2026.07 미만        RI.2026.07 이상       
       
        CVE-2026-20320        BroadWorks Xtended Services Platform        RI.2026.07 미만        RI.2026.07 이상       
       
        CVE-2026-20337        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20337        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20337        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20337        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20338        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20338        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20338        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20338        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20339        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20339        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20339        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20339        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20345        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20345        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20345        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20345        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20346        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20346        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20346        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20346        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20347        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20347        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20347        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20347        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
       
        CVE-2026-20348        Secure Endpoint Connector for Linux        1.29.2 미만        1.29.2 이상       
       
        CVE-2026-20348        Secure Endpoint Connector for Mac        1.27.4 미만        1.27.4 이상       
       
        CVE-2026-20348        Secure Endpoint Connector for Windows        7.5.24.21780 미만        7.5.24.21780 이상       
       
        CVE-2026-20348        Secure Endpoint Connector for Windows        8.6.3 미만        8.6.3 이상       
           
    
    
※ 하단의 참고 사이트를 확인하여 업데이트 수행 [1]~[3]

    
□ 참고사이트
 [1] https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxr-qg64NcM
 [2] https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bworks-xxe-uwUd7CEt
 [3] https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26
 [4] https://nvd.nist.gov/vuln/detail/CVE-2026-20274
 [5] https://nvd.nist.gov/vuln/detail/CVE-2026-20275
 [6] https://nvd.nist.gov/vuln/detail/CVE-2026-20276
 [7] https://nvd.nist.gov/vuln/detail/CVE-2026-20277
 [8] https://nvd.nist.gov/vuln/detail/CVE-2026-20278
 [9] https://nvd.nist.gov/vuln/detail/CVE-2026-20279
 [10] https://nvd.nist.gov/vuln/detail/CVE-2026-20280
 [11] https://nvd.nist.gov/vuln/detail/CVE-2026-20320
 [12] https://nvd.nist.gov/vuln/detail/CVE-2026-20337
 [13] https://nvd.nist.gov/vuln/detail/CVE-2026-20338
 [14] https://nvd.nist.gov/vuln/detail/CVE-2026-20339
 [15] https://nvd.nist.gov/vuln/detail/CVE-2026-20345
 [16] https://nvd.nist.gov/vuln/detail/CVE-2026-20346
 [17] https://nvd.nist.gov/vuln/detail/CVE-2026-20347
 [18] https://nvd.nist.gov/vuln/detail/CVE-2026-20348

    
□ 문의사항
 o 한국인터넷진흥원 사이버민원센터 : 국번없이 118

    
□ 작성 : 디지털위협대응본부 취약점관리센터

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