CVE-2021-1400Network attack vector

Authenticated administrator impersonation via insufficient input validation

Published May 6, 2021 · Updated Nov 8, 2024

Information disclosure in Cisco Small Business WAP firmware allows remote authenticated users to impersonate device users via HTTP requests. The web-based management interface insufficiently validates crafted request input and returns sensitive information that enables impersonation. Valid non-administrative credentials and network access to the management interface are required; successful exploitation can impersonate an administrator.

CVSS severity8.8
High
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Cisco Small Business WAP firmware allows remote authenticated users to impersonate device users via HTTP requests. The web-based management interface insufficiently validates crafted request input and returns sensitive information that enables impersonation. Valid non-administrative credentials and network access to the management interface are required; successful exploitation can impersonate an administrator.

The record

CVE
CVE-2021-1400
Published
May 6, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Business Wireless Access Point Software
Classifications
CWE-269, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Business Wireless Access Point Softwareversion=n/a

Published CVSS scores

8.8CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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