CVE-2020-1821: There are multiple out of bounds (OOB) read vulnerabilities in the implementation of the Common Open Policy Se
22
Routine
LOW 3.7REMOTEMITIGATEMITIGATEMITIGATE
CVE-2020-1821 is a low-severity flaw (CVSS 3.7) affecting ips module firmware, ngfw module firmware, nip6300 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
There are multiple out of bounds (OOB) read vulnerabilities in the implementation of the Common Open Policy Service (COPS) protocol of some Huawei products. The specific decoding function may occur out-of-bounds read when processes an incoming data packet. Successful exploit of these vulnerabilities may disrupt service on the affected device. (Vulnerability ID: HWPSIRT-2018-12275,HWPSIRT-2018-12276,HWPSIRT-2018-12277,HWPSIRT-2018-12278,HWPSIRT-20
Why this priority
Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
huawei ips module firmware MITIGATE
Affected: v500r001c30 · v500r001c60 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r001c30
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.
huawei ngfw module firmware MITIGATE
Affected: v500r002c00 · v500r002c20 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r002c00
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.
huawei nip6300 firmware MITIGATE
Affected: v500r001c30 · v500r001c60 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r001c30
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.
huawei nip6600 firmware MITIGATE
Affected: v500r001c30 · v500r001c60 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r001c30
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.
huawei nip6800 firmware MITIGATE
Affected: v500r001c60 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r001c60
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.
huawei secospace usg6300 firmware MITIGATE
Affected: v500r001c30 · v500r001c60 · v500r005c00
Fixed in: no fixed release known
Safe to downgrade to: a release before v500r001c30
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 sourceNVD · 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-2020-1821?
ips module firmware: mitigate or apply the listed mitigation; ngfw module firmware: mitigate or apply the listed mitigation; nip6300 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2020-1821 being exploited?
CVE-2020-1821 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-2020-1821 affect?
CVE-2020-1821 affects ips module firmware, ngfw module firmware, nip6300 firmware. Severity is low (CVSS 3.7). There are multiple out of bounds (OOB) read vulnerabilities in the implementation of the Common Open Policy Service (COPS) protocol of some Huawei products. The specific decoding function may occur out-of-bounds read when processes an incom
How urgent is CVE-2020-1821?
Priority 22/100. Remotely exploitable, no login, no user action
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