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High severity7.5NVD Advisory· Published Feb 12, 2020· Updated Jun 16, 2026

CVE-2011-4661

CVE-2011-4661

Description

A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.

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Affected products

3
  • Cisco Systems, Inc./Cisco iOSv53 versions
    before 15.2(1)T+ 2 more
    • (no CPE)range: before 15.2(1)T
    • (no CPE)range: <15.2(1)T
    • cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*range: <15.2\(1\)t

Patches

Vulnerability mechanics

References

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