CVE-2020-1856

Huawei NGFW Module, NIP6300, NIP6600, Secospace USG6500, Secospace USG6600, and USG9500 versions V500R001C30, V500R001C60, and V500R005C00 have an information leakage vulnerability. An attacker can exploit this vulnerability by sending specific request packets to affected devices. Successful exploit may lead to information leakage.

Published: 2020-02-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-1856 is rated Moderate Risk (48.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.76%). Review affected assets and schedule remediation.

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-2020-1856

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 2026-06-15 0.15% 0.76% +0.61%
2 2025-03-30 0.29% 0.15% -0.14%
3 2025-03-29 — 0.29% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1856

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N 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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-1856

Affected software / configurations for CVE-2020-1856

Vendor Product Version Raw CPE
huawei ngfw_module_firmware v500r001c30 cpe:2.3:o:huawei:ngfw_module_firmware:v500r001c30:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r001c60 cpe:2.3:o:huawei:ngfw_module_firmware:v500r001c60:*:*:*:*:*:*:*
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 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 v500r001c60 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c60:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c00 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c00:*:*:*:*:*:*:*
huawei usg9500_firmware v500r001c30 cpe:2.3:o:huawei:usg9500_firmware:v500r001c30:*:*:*:*:*:*:*
huawei usg9500_firmware v500r001c60 cpe:2.3:o:huawei:usg9500_firmware:v500r001c60:*:*:*:*:*:*:*
huawei usg9500_firmware v500r005c00 cpe:2.3:o:huawei:usg9500_firmware:v500r005c00:*:*:*:*:*:*:*

References for CVE-2020-1856

cvelogic Threat Intelligence