What’s Vulnerable › Vulnerabilities

CVE-2019-18990

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-30 · updated 2026-06-17
• Weakness: CWE-290

Description

A partial authentication bypass vulnerability exists on Realtek RTL8812AR 1.21WW, RTL8196D 1.0.0, RTL8192ER 2.10, and RTL8881AN 1.09 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.

Affected products

• Realtek Rtl8192Er Firmware: 2.10
• Realtek Rtl8196D Firmware: 1.0.0
• Realtek Rtl8812Ar Firmware: 1.21ww
• Realtek Rtl8881An Firmware: 1.09

References

• https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/
• https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/

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