How severe is CVE-2021-22366?

CVE-2021-22366 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22366?

CVE-2021-22366 primarily affects Huawei Ese620x Vess Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22366?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22366 published?

CVE-2021-22366 was published on 2021-06-22 and last updated on 2026-06-17.

CVE-2021-22366

CVE-2021-22366 is a medium-severity vulnerability in Huawei Ese620x Vess Firmware with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Huawei Ese620x Vess Firmware
Published: 2021-06-22
Last modified: 2026-06-17

Description

There is an out-of-bounds read vulnerability in eSE620X vESS V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300. The vulnerability is due to a function that handles an internal message contains an out-of-bounds read vulnerability. An attacker could crafted messages between system process, successful exploit could cause Denial of Service (DoS).

Frequently asked questions

What is CVE-2021-22366?: There is an out-of-bounds read vulnerability in eSE620X vESS V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300. The vulnerability is due to a function that handles an internal message contains an out-of-bounds read vulnerability. An attacker could crafted messages between system process, successful exploit could cause Denial of Service (DoS).
How severe is CVE-2021-22366?: CVE-2021-22366 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22366?: CVE-2021-22366 primarily affects Huawei Ese620x Vess Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22366 published?: CVE-2021-22366 was published on 2021-06-22 and last updated on 2026-06-17.

References

https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210526-03-dos-en

Affected products (3)

cpe:2.3:o:huawei:ese620x_vess_firmware:v100r001c10spc200:*:*:*:*:*:*:*
cpe:2.3:o:huawei:ese620x_vess_firmware:v100r001c20spc200:*:*:*:*:*:*:*
cpe:2.3:o:huawei:ese620x_vess_firmware:v200r001c00spc300:*:*:*:*:*:*:*

More vulnerabilities in Huawei Ese620x Vess Firmware

CVE-2021-22396 — High (CVSS 7.8): There is a privilege escalation vulnerability in some Huawei products. Due to improper privilege management, a local…
CVE-2021-22361 — High (CVSS 7.8): There is an improper authorization vulnerability in eCNS280 V100R005C00, V100R005C10 and eSE620X vESS…
CVE-2021-39999 — High (CVSS 7.5): There is a buffer overflow vulnerability in eSE620X vESS V100R001C10SPC200 and V100R001C20SPC200. An attacker can…
CVE-2021-39995 — Medium (CVSS 6.5): Some Huawei products use the OpenHpi software for hardware management. A function that parses data returned by OpenHpi…
CVE-2021-22383 — Medium (CVSS 4.9): There is an out-of-bounds read vulnerability in eCNS280_TD V100R005C10 and eSE620X vESS V100R001C10SPC200,…
CVE-2021-22365 — Low (CVSS 3.3): There is an out of bounds read vulnerability in eSE620X vESS V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300. A…

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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