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High severity8.8NVD Advisory· Published Sep 24, 2020· Updated Jun 17, 2026

CVE-2020-3400

CVE-2020-3400

Description

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to utilize parts of the web UI for which they are not authorized.The vulnerability is due to insufficient authorization of web UI access requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web UI. A successful exploit could allow the attacker to utilize parts of the web UI for which they are not authorized. This could allow a Read-Only user to perform actions of an Admin user.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

17
  • Cisco Systems, Inc./iOS Xe15 versions
    cpe:2.3:o:cisco:ios_xe:16.2.2:*:*:*:*:*:*:*+ 14 more
    • cpe:2.3:o:cisco:ios_xe:16.2.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.10:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.11:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.1a:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.3:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.4:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.5:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.5b:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.6:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.7:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.8:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:16.3.9:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios_xe:17.2.1t:*:*:*:*:*:*:*
  • Cisco Systems, Inc./IOS and IOS XE Softwarellm-fuzzy
  • Cisco Systems, Inc./IOS XE Software for Cisco Merakicpe-rescue
    Range: n/a

Patches

Vulnerability mechanics

References

1

News mentions

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