CVE-2021-22383Network attack vector

Service interruption via out-of-bounds message read

Published Jun 22, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Huawei eCNS280_TD and eSE620X vESS firmware allows remote authenticated users to interrupt service via crafted packets. An undisclosed message-handling function reads beyond its intended memory boundary when it processes a specifically formed message. Exploitation requires high privileges and the ability to send packets to the affected module; Huawei reports denial of service as the sole impact.

CVSS severity4.4
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Huawei eCNS280_TD and eSE620X vESS firmware allows remote authenticated users to interrupt service via crafted packets. An undisclosed message-handling function reads beyond its intended memory boundary when it processes a specifically formed message. Exploitation requires high privileges and the ability to send packets to the affected module; Huawei reports denial of service as the sole impact.

The record

CVE
CVE-2021-22383
Published
Jun 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 22, 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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.1HuaweiCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C
4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.4HuaweiCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
6.8NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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