CVE-2021-1284

Unauthenticated configuration access via insufficient authorization checks

Published May 6, 2021 · Updated Nov 8, 2024

Authentication bypass in Cisco Catalyst SD-WAN Manager allows attackers to read and modify configuration through crafted HTTP requests. The web-based messaging service interface accepts the requests without sufficient authorization checks, granting unauthenticated read and write access. Exploitation requires access through an associated Cisco SD-WAN vEdge device and permits changes to the manager and managed devices.

CVSS severity8.8
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Cisco Catalyst SD-WAN Manager allows attackers to read and modify configuration through crafted HTTP requests. The web-based messaging service interface accepts the requests without sufficient authorization checks, granting unauthenticated read and write access. Exploitation requires access through an associated Cisco SD-WAN vEdge device and permits changes to the manager and managed devices.

The record

CVE
CVE-2021-1284
Published
May 6, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Catalyst SD-WAN Manager
Classifications
CWE-284, T1210
Attack vector
adjacent
Privileges
unauthenticated

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 vectoradjacent
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Catalyst SD-WAN Managerversion=n/a

Published CVSS scores

5.8NIST NVDAV:A/AC:L/Au:N/C:P/I:P/A:P
8.8Cisco Systems, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1210Exploitation of Remote Services

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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