CVE-2018-20817

9.8 criticalEPSS 3.6%

Critical (9.8) in activision call of duty\. EPSS 3.6% chance of exploitation in the next 30 days.

SV_SteamAuthClient in various Activision Infinity Ward Call of Duty games before 2015-08-11 is missing a size check when reading authBlob data into a buffer, which allows one to execute code on the remote target machine when sending a steam authentication request. This affects Call of Duty: Modern Warfare 2, Call of Duty: Modern Warfare 3, Call of Duty: Ghosts, Call of Duty: Advanced Warfare, Call of Duty: Black Ops 1, and Call of Duty: Black Ops 2.

Severity

CVSS 3.0

9.8 critical

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 3.6% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2019-04-19
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

activision:call_of_duty\

References

https://github.com/RektInator/cod-steamauth-rce
https://github.com/momo5502/cod-exploits/tree/master/steam-auth
https://github.com/RektInator/cod-steamauth-rce
https://github.com/momo5502/cod-exploits/tree/master/steam-auth

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