CVE-2020-9086

Adjacent-network service disruption via malformed UPnP message

Published Dec 27, 2024 · Updated Dec 27, 2024

Buffer error in HUAWEI 4G Router B612 firmware allows remote attackers on the adjacent network to interrupt a service via UPnP. UPnP message processing insufficiently validates an unspecified value in a specially crafted message, causing abnormal service operation. Access to the router's network is required, and the published impact is limited to low-availability service disruption rather than data disclosure or modification.

CVSS severity4.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer error in HUAWEI 4G Router B612 firmware allows remote attackers on the adjacent network to interrupt a service via UPnP. UPnP message processing insufficiently validates an unspecified value in a specially crafted message, causing abnormal service operation. Access to the router's network is required, and the published impact is limited to low-availability service disruption rather than data disclosure or modification.

The record

CVE
CVE-2020-9086
Published
Dec 27, 2024
Updated
Dec 27, 2024
Vendor
MindSpore
Product
HUAWEI 4G Router B612
Classifications
T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 27, 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=B612s-25dTCPU-V100R001B192D03SP00C234
  2. Affected versionversion=B612s-25dTCPU-V100R001B192D03SP00C287
  3. Affected versionversion=B612s-25dTCPU-V100R001B192D05SP00C00

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

MindSpore · HUAWEI 4G Router B612version=B612s-25dTCPU-V100R001B192D03SP00C234; version=B612s-25dTCPU-V100R001B192D03SP00C287; version=B612s-25dTCPU-V100R001B192D05SP00C00

Published CVSS scores

4.0Huawei PSIRTCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C
4.3Huawei PSIRTCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

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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