How severe is CVE-2020-1863?

CVE-2020-1863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-1863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-1863?

CVE-2020-1863 primarily affects Huawei Usg6000v 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-2020-1863?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-1863 published?

CVE-2020-1863 was published on 2020-03-12 and last updated on 2026-06-17.

CVE-2020-1863

CVE-2020-1863 is a high-severity vulnerability in Huawei Usg6000v Firmware with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Huawei Usg6000v Firmware
Published: 2020-03-12
Last modified: 2026-06-17

Description

Huawei USG6000V with versions V500R001C20SPC300, V500R003C00SPC100, and V500R005C00SPC100 have an out-of-bounds read vulnerability. Due to a logical flaw in a JSON parsing routine, a remote, unauthenticated attacker could exploit this vulnerability to disrupt service in the affected products.

Frequently asked questions

What is CVE-2020-1863?: Huawei USG6000V with versions V500R001C20SPC300, V500R003C00SPC100, and V500R005C00SPC100 have an out-of-bounds read vulnerability. Due to a logical flaw in a JSON parsing routine, a remote, unauthenticated attacker could exploit this vulnerability to disrupt service in the affected products.
How severe is CVE-2020-1863?: CVE-2020-1863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-1863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-1863?: CVE-2020-1863 primarily affects Huawei Usg6000v 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-2020-1863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-1863 published?: CVE-2020-1863 was published on 2020-03-12 and last updated on 2026-06-17.

References

https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200311-01-buffer-en

Affected products (3)

cpe:2.3:o:huawei:usg6000v_firmware:v500r001c20spc300:*:*:*:*:*:*:*
cpe:2.3:o:huawei:usg6000v_firmware:v500r003c00spc100:*:*:*:*:*:*:*
cpe:2.3:o:huawei:usg6000v_firmware:v500r005c00spc100:*:*:*:*:*:*:*

More vulnerabilities in Huawei Usg6000v Firmware

CVE-2019-5254 — High (CVSS 8.6): Certain Huawei products (AP2000;IPS Module;NGFW Module;NIP6300;NIP6600;NIP6800;S5700;SVN5600;SVN5800;SVN5800-C;SeMG9811;…
CVE-2017-17258 — High (CVSS 7.5): Huawei AR120-S V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R006C10, V200R006C13, V200R007C00,…
CVE-2017-17257 — High (CVSS 7.5): Huawei AR120-S V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R006C10, V200R006C13, V200R007C00,…
CVE-2017-17256 — High (CVSS 7.5): Huawei AR120-S V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R006C10, V200R006C13, V200R007C00,…
CVE-2017-17255 — High (CVSS 7.5): Huawei AR120-S V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R006C10, V200R006C13, V200R007C00,…
CVE-2017-17254 — High (CVSS 7.5): Huawei AR120-S V200R006C10, V200R007C00, V200R008C20, V200R008C30, AR1200 V200R006C10, V200R006C13, V200R007C00,…

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

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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