CVE-2020-1818

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-2018-12279,HWPSIRT-2018-12280 and HWPSIRT-2018-12289) The seven vulnerabilities have been assigned seven Common Vulnerabilities and Exposures (CVE) IDs: CVE-2020-1818, CVE-2020-1819, CVE-2020-1820, CVE-2020-1821, CVE-2020-1822, CVE-2020-1823 and CVE-2020-1824.

Published: 2024-12-27 Last update: 2025-01-10 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-1818 is rated Low Risk (24.3/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.10%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-1818

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.15% 0.10% -0.06%
2 2025-11-18 0.05% 0.15% +0.10%
3 2025-08-02 — 0.05% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1818

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.2 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2020-1818

Affected software / configurations for CVE-2020-1818

Vendor Product Version Raw CPE
huawei ips_module_firmware v500r001c30 cpe:2.3:o:huawei:ips_module_firmware:v500r001c30:*:*:*:*:*:*:*
huawei ips_module_firmware v500r001c60 cpe:2.3:o:huawei:ips_module_firmware:v500r001c60:*:*:*:*:*:*:*
huawei ips_module_firmware v500r005c00 cpe:2.3:o:huawei:ips_module_firmware:v500r005c00:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r002c00 cpe:2.3:o:huawei:ngfw_module_firmware:v500r002c00:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r002c20 cpe:2.3:o:huawei:ngfw_module_firmware:v500r002c20:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r005c00 cpe:2.3:o:huawei:ngfw_module_firmware:v500r005c00:*:*:*:*:*:*:*
huawei nip6300_firmware v500r001c30 cpe:2.3:o:huawei:nip6300_firmware:v500r001c30:*:*:*:*:*:*:*
huawei nip6300_firmware v500r001c60 cpe:2.3:o:huawei:nip6300_firmware:v500r001c60:*:*:*:*:*:*:*
huawei nip6300_firmware v500r005c00 cpe:2.3:o:huawei:nip6300_firmware:v500r005c00:*:*:*:*:*:*:*
huawei nip6600_firmware v500r001c30 cpe:2.3:o:huawei:nip6600_firmware:v500r001c30:*:*:*:*:*:*:*
huawei nip6600_firmware v500r001c60 cpe:2.3:o:huawei:nip6600_firmware:v500r001c60:*:*:*:*:*:*:*
huawei nip6600_firmware v500r005c00 cpe:2.3:o:huawei:nip6600_firmware:v500r005c00:*:*:*:*:*:*:*
huawei nip6800_firmware v500r001c60 cpe:2.3:o:huawei:nip6800_firmware:v500r001c60:*:*:*:*:*:*:*
huawei nip6800_firmware v500r005c00 cpe:2.3:o:huawei:nip6800_firmware:v500r005c00:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r001c30 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c30:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r001c60 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c60:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r005c00 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r005c00:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r001c30 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c30:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r001c60 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c60:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r005c00 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r005c00:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r001c30 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c30:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c00 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c00:*:*:*:*:*:*:*
huawei usg6000v_firmware v500r003c00 cpe:2.3:o:huawei:usg6000v_firmware:v500r003c00:*:*:*:*:*:*:*

References for CVE-2020-1818

cvelogic Threat Intelligence