CVE-2021-22292Network attack vector

Web application interruption via message flood

Published Feb 6, 2021 · Updated Aug 3, 2024

Resource-exhaustion denial of service in Huawei eCNS280 V100R005C00 and V100R005C10 allows remote attackers to interrupt its web application. A design defect lets an unauthenticated sender consume system resources by transmitting a large volume of specific, undisclosed messages. The sender needs remote reachability to the device; Huawei has not disclosed the message format, affected service, or whether interruption ends without operator action.

CVSS severity5.3
Medium
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource-exhaustion denial of service in Huawei eCNS280 V100R005C00 and V100R005C10 allows remote attackers to interrupt its web application. A design defect lets an unauthenticated sender consume system resources by transmitting a large volume of specific, undisclosed messages. The sender needs remote reachability to the device; Huawei has not disclosed the message format, affected service, or whether interruption ends without operator action.

The record

CVE
CVE-2021-22292
Published
Feb 6, 2021
Updated
Aug 3, 2024
Vendor
Huawei
Product
eCNS280
Classifications
T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=V100R005C00
  2. Affected versionversion=V100R005C10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Huawei · eCNS280version=V100R005C00; version=V100R005C10

Published CVSS scores

5.3HuaweiCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.8NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.9HuaweiCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.002Endpoint Denial of Service: Service Exhaustion Flood

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo