How severe is CVE-2019-5273?

CVE-2019-5273 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-2019-5273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5273?

CVE-2019-5273 primarily affects Huawei Usg9500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-5273?

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-2019-5273 published?

CVE-2019-5273 was published on 2019-12-26 and last updated on 2026-06-17.

CVE-2019-5273

CVE-2019-5273 is a high-severity vulnerability in Huawei Usg9500 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Huawei Usg9500 Firmware
Published: 2019-12-26
Last modified: 2026-06-17

Description

USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability. Due to a flaw in the X.509 implementation in the affected products which can result in a large heap buffer overrun error, an attacker may exploit the vulnerability by a malicious certificate, resulting a denial of service on the affected products.

Frequently asked questions

What is CVE-2019-5273?: USG9500 with versions of V500R001C30;V500R001C60 have a denial of service vulnerability. Due to a flaw in the X.509 implementation in the affected products which can result in a large heap buffer overrun error, an attacker may exploit the vulnerability by a malicious certificate, resulting a denial of service on the affected products.
How severe is CVE-2019-5273?: CVE-2019-5273 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-2019-5273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5273?: CVE-2019-5273 primarily affects Huawei Usg9500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-5273?: 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-2019-5273 published?: CVE-2019-5273 was published on 2019-12-26 and last updated on 2026-06-17.

References

https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-eudemon-en

Affected products (2)

cpe:2.3:o:huawei:usg9500_firmware:v500r001c30:*:*:*:*:*:*:*
cpe:2.3:o:huawei:usg9500_firmware:v500r001c60:*:*:*:*:*:*:*

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