CVE-2020-9086: There is a buffer error vulnerability in some Huawei product

Routine

MEDIUM 4.3MITIGATE

CVE-2020-9086 is a medium-severity flaw (CVSS 4.3) affecting b612 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There is a buffer error vulnerability in some Huawei product. An unauthenticated attacker may send special UPNP message to the affected products. Due to insufficient input validation of some value, successful exploit may cause some service abnormal. (Vulnerability ID: HWPSIRT-2017-08234) This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2020-9086.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-124, CWE-787
Published	2024-12-27
Last modified	2026-06-17

Publisher (CNA): Huawei Technologies · Vendor: huawei

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-12-27 10:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

huawei b612 firmware MITIGATE

Affected: b612s-25dtcpu-v100r001b192d03sp00c234 · b612s-25dtcpu-v100r001b192d03sp00c287 · b612s-25dtcpu-v100r001b192d05sp00c00

Fixed in: no fixed release known

Safe to downgrade to: a release before b612s-25dtcpu-v100r001b192d03sp00c234

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-9086?

b612 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-9086 being exploited?

CVE-2020-9086 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-9086 affect?

CVE-2020-9086 affects b612 firmware. Severity is medium (CVSS 4.3). There is a buffer error vulnerability in some Huawei product. An unauthenticated attacker may send special UPNP message to the affected products. Due to insufficient input validation of some value, successful exploit may cause some service

How urgent is CVE-2020-9086?

Priority 18/100. No elevated risk signals yet.

Software pages

Huawei vulnerabilities

Related CVEs

CVE-2020-9085 MEDIUM 5.3 MITIGATE There is a NULL pointer dereference vulnerability in some Huawei products

References

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