CVE-2021-22357

There is a denial of service vulnerability in Huawei products. A module cannot deal with specific messages due to validating inputs insufficiently. Attackers can exploit this vulnerability by sending specific messages to affected module. This can cause denial of service. Affected product versions include: S12700 V200R013C00SPC500, V200R019C00SPC500; S5700 V200R013C00SPC500, V200R019C00SPC500; S6700 V200R013C00SPC500, V200R019C00SPC500; S7700 V200R013C00SPC500, V200R019C00SPC500.

Published: 2021-08-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22357 is rated Moderate Risk (47/100): CVSS High severity, with low exploitation likelihood (EPSS 0.67%). 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-2021-22357

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 0.18% 0.67% +0.49%
2 2025-03-17 0.09% 0.18% +0.10%
3 2023-03-07 — 0.09% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22357

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: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: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.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/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: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.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2021-22357

Affected software / configurations for CVE-2021-22357

Vendor Product Version Raw CPE
huawei s12700_firmware v200r013c00spc500 cpe:2.3:o:huawei:s12700_firmware:v200r013c00spc500:*:*:*:*:*:*:*
huawei s12700_firmware v200r019c00spc500 cpe:2.3:o:huawei:s12700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
huawei s5700_firmware v200r013c00spc500 cpe:2.3:o:huawei:s5700_firmware:v200r013c00spc500:*:*:*:*:*:*:*
huawei s5700_firmware v200r019c00spc500 cpe:2.3:o:huawei:s5700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
huawei s6700_firmware v200r013c00spc500 cpe:2.3:o:huawei:s6700_firmware:v200r013c00spc500:*:*:*:*:*:*:*
huawei s6700_firmware v200r019c00spc500 cpe:2.3:o:huawei:s6700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
huawei s7700_firmware v200r013c00spc500 cpe:2.3:o:huawei:s7700_firmware:v200r013c00spc500:*:*:*:*:*:*:*
huawei s7700_firmware v200r019c00spc500 cpe:2.3:o:huawei:s7700_firmware:v200r019c00spc500:*:*:*:*:*:*:*

References for CVE-2021-22357

cvelogic Threat Intelligence