HOMEVULNERABILITIESCVE-2020-7949
HIGHPOC

CVE-2020-7949

NVD-CWE-noinfoPublished: January 27, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

schemasystem.dll in Valve Dota 2 before 7.23f allows remote attackers to achieve code execution or denial of service by creating a gaming server and inviting a victim to this server, because a crafted map is mishandled during a GetValue call.

NVD Source

Technical Analysis

CVE-2020-7949 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

A proof-of-concept (PoC) exploit exists for CVE-2020-7949. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

valvesoftware1 product(s)
dota 2
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/bi7s/CVE/tree/master/CVE-2020-7949
ADVISORYhttps://github.com/bi7s/CVE/tree/master/CVE-2020-7949

All References (2)

→
https://github.com/bi7s/CVE/tree/master/CVE-2020-7949Third Party Advisory
→
https://github.com/bi7s/CVE/tree/master/CVE-2020-7949Third Party Advisory

Quick Facts

CVE IDCVE-2020-7949
CVSS Score7.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedJan 27, 2020

Related CVEs (NVD-CWE-noinfo)

CVE-2009-1420
10.0
CVE-2009-1012
10.0
CVE-2009-0721
10.0
CVE-2008-6578
10.0
CVE-2009-1240
10.0
CVE-2009-2028
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-7949 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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