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CVE-2021-40042

22
FAUCET Score

CVE-2021-40042 describes an invalid pointer vulnerability in specific versions of Huawei CloudEngine 12800, 5800, 6800, and 7800 series switches. This vulnerability has a CVSS score of 6.5 (Medium) due to its network-based attack vector, low attack complexity, and the potential for high impact on availability, leading to process and service abnormalities. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
v200r019c10spc800CPE matchmatch criteria
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r019c10spc800:*:*:*:*:*:*:*
v200r019c10spc900CPE matchmatch criteria
cpe:2.3:o:huawei:cloudengine_12800_firmware:v200r019c10spc900:*:*:*:*:*:*:*
v200r019c10spc800CPE matchmatch criteria
cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r019c10spc800:*:*:*:*:*:*:*
v200r020c00spc600CPE matchmatch criteria
cpe:2.3:o:huawei:cloudengine_5800_firmware:v200r020c00spc600:*:*:*:*:*:*:*
v200r019c10spc800CPE matchmatch criteria
cpe:2.3:o:huawei:cloudengine_6800_firmware:v200r019c10spc800:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 53rd percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

huawei.com / en/psirt/security-advisories/huawei-sa-20220112-01-invalid-en
Vendor Advisory