CVE-2019-5274: Huawei USG9500 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 an infinite loop, an attacker may exploit the vulnerability via a malicious certificate to perform a denial of service attack on the affected products.

Affected products

• Huawei USG9500 Firmware: version v500r001c30 only; version v500r001c60 only

Published 2019-12-26. Last modified 2026-06-17.