CVE-2021-37122

There is a use-after-free (UAF) vulnerability in Huawei products. An attacker may craft specific packets to exploit this vulnerability. Successful exploitation may cause the service abnormal. Affected product versions include:CloudEngine 12800 V200R005C10SPC800,V200R019C00SPC800;CloudEngine 5800 V200R005C10SPC800,V200R019C00SPC800;CloudEngine 6800 V200R005C10SPC800,V200R005C20SPC800,V200R019C00SPC800;CloudEngine 7800 V200R005C10SPC800,V200R019C00SPC800.

Published: 2021-10-26 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-37122 is rated Low Risk (32.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). 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-2021-37122

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 0.05% 0.26% +0.21%
2 2023-05-19 0.04% 0.05% +0.01%
3 2023-03-07 — 0.04% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-37122

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
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:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2021-37122

Affected software / configurations for CVE-2021-37122

Vendor Product Version Raw CPE
huawei cloudengine_12800_firmware v200r005c10spc800 cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r005c10spc800:*:*:*:*:*:*:*
huawei cloudengine_12800_firmware v200r019c00spc800 cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r019c00spc800:*:*:*:*:*:*:*
huawei cloudengine_5800_firmware v200r005c10spc800 cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r005c10spc800:*:*:*:*:*:*:*
huawei cloudengine_5800_firmware v200r019c00spc800 cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r019c00spc800:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r005c10spc800 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r005c10spc800:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r005c20spc800 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r005c20spc800:*:*:*:*:*:*:*
huawei cloudengine_6800_firmware v200r019c00spc800 cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r019c00spc800:*:*:*:*:*:*:*
huawei cloudengine_7800_firmware v200r005c10spc800 cpe:2.3:o:huawei:cloudengine_7800_firmware:v200r005c10spc800:*:*:*:*:*:*:*
huawei cloudengine_7800_firmware v200r019c00spc800 cpe:2.3:o:huawei:cloudengine_7800_firmware:v200r019c00spc800:*:*:*:*:*:*:*

References for CVE-2021-37122

cvelogic Threat Intelligence