CVE-2021-46835

Packet hijacking via improper ICMP processing

Published Sep 20, 2022 · Updated May 28, 2025

Traffic hijacking in Huawei WS7200-10 11.0.2.13 allows attackers with LAN access to hijack packets via crafted ICMP messages. The router improperly processes malicious ICMP packets that an attacker sends to a victim, enabling interception of affected traffic. Exploitation requires access to the device within its LAN; Huawei reports packet hijacking but no code execution or device takeover.

CVSS severity6.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Traffic hijacking in Huawei WS7200-10 11.0.2.13 allows attackers with LAN access to hijack packets via crafted ICMP messages. The router improperly processes malicious ICMP packets that an attacker sends to a victim, enabling interception of affected traffic. Exploitation requires access to the device within its LAN; Huawei reports packet hijacking but no code execution or device takeover.

The record

CVE
CVE-2021-46835
Published
Sep 20, 2022
Updated
May 28, 2025
Vendor
MindSpore
Product
WS7200-10
Classifications
CWE-294, T1557
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 2022CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record 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=11.0.2.13

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

MindSpore · WS7200-10version=11.0.2.13

Published CVSS scores

6.3HuaweiCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
5.9HuaweiCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L/E:F/RL:O/RC:C
4.3NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
T1557Adversary-in-the-Middle

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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