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CVE-2018-20817

32
FAUCET Score

CVE-2018-20817 is a critical vulnerability affecting multiple Activision Infinity Ward Call of Duty games released before August 11, 2015, including Modern Warfare 2, Modern Warfare 3, Ghosts, Advanced Warfare, Black Ops 1, and Black Ops 2. It stems from a missing size check when processing Steam authentication data, allowing remote code execution. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:activision:call_of_duty\:_advanced_warfare:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:activision:call_of_duty\:_black_ops_1:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:activision:call_of_duty\:_blacks_ops_2:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:activision:call_of_duty\:_ghosts:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:activision:call_of_duty\:_modern_warfare_2:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.63%
Probability of exploitation in next 30 days
EPSS Percentile
88.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0363 is in the 81st percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / momo5502/cod-exploits/tree/master/steam-auth
Third Party Advisory
github.com / RektInator/cod-steamauth-rce
ExploitThird Party Advisory