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CVE-2021-22366

19
FAUCET Score

CVE-2021-22366 is an out-of-bounds read vulnerability affecting Huawei eSE620X vESS versions V100R001C10SPC200, V100R001C20SPC200, and V200R001C00SPC300. This flaw, stemming from a function handling internal messages, allows an attacker to craft messages between system processes. Successful exploitation could lead to a Denial of Service (DoS) condition, rated as Medium severity with a CVSS score of 5.5. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
v100r001c10spc200CPE matchmatch criteria
cpe:2.3:o:huawei:ese620x_vess_firmware:v100r001c10spc200:*:*:*:*:*:*:*
v100r001c20spc200CPE matchmatch criteria
cpe:2.3:o:huawei:ese620x_vess_firmware:v100r001c20spc200:*:*:*:*:*:*:*
v200r001c00spc300CPE matchmatch criteria
cpe:2.3:o:huawei:ese620x_vess_firmware:v200r001c00spc300:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.16%
Probability of exploitation in next 30 days
EPSS Percentile
5.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0016 is in the 32nd percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 0.1 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-20210526-03-dos-en
Vendor Advisory