What’s Vulnerable › Vulnerabilities

CVE-2022-27255

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 36.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-01 · updated 2026-06-17
• Weakness: CWE-20

Description

In Realtek eCos RSDK 1.5.7p1 and MSDK 4.9.4p1, the SIP ALG function that rewrites SDP data has a stack-based buffer overflow. This allows an attacker to remotely execute code without authentication via a crafted SIP packet that contains malicious SDP data.

Affected products

• Realtek Ecos Msdk Firmware: 4.9.4p1
• Realtek Ecos Rsdk Firmware: 1.5.7p1

References

• https://forum.defcon.org/node/241835
• https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2022-27255.pdf
• https://forum.defcon.org/node/241835
• https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2022-27255.pdf

Get alerted when CVE-2022-27255 or the next vulnerability affects your stack