CVE-2021-40042

There is a release of invalid pointer vulnerability in some Huawei products, successful exploit may cause the process and service abnormal. Affected product versions include: CloudEngine 12800 V200R019C10SPC800, V200R019C10SPC900; CloudEngine 5800 V200R019C10SPC800, V200R020C00SPC600; CloudEngine 6800 versions V200R019C10SPC800, V200R019C10SPC900, V200R020C00SPC600, V300R020C00SPC200; CloudEngine 7800 V200R019C10SPC800.

Published: 2022-01-31 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-40042 is rated Low Risk (38.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.17%). 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-2021-40042

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 2025-03-17 0.07% 0.17% +0.10%
2 2023-03-07 0.89% 0.07% -0.81%
3 2022-02-04 — 0.89% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-40042

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 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:L)
A normal user session is enough; they don’t have to be admin.
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:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P 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:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2021-40042

Affected software / configurations for CVE-2021-40042

Vendor Product Version Raw CPE
huawei cloudengine_12800_firmware v200r019c10spc800 cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r019c10spc800:*:*:*:*:*:*:*
huawei cloudengine_12800_firmware v200r019c10spc900 cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r019c10spc900:*:*:*:*:*:*:*
huawei cloudengine_5800_firmware v200r019c10spc800 cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r019c10spc800:*:*:*:*:*:*:*
huawei cloudengine_5800_firmware v200r020c00spc600 cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r020c00spc600:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r019c10spc800 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r019c10spc800:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r019c10spc900 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r019c10spc900:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r020c00spc600 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r020c00spc600:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v300r020c00spc200 cpe:2.3:o:huawei:cloudengine_6800_firmware:v300r020c00spc200:*:*:*:*:*:*:*
huawei cloudengine_7800_firmware v200r019c10spc800 cpe:2.3:o:huawei:cloudengine_7800_firmware:v200r019c10spc800:*:*:*:*:*:*:*

References for CVE-2021-40042

cvelogic Threat Intelligence