HOMEVULNERABILITIESCVE-2020-7951
HIGH

CVE-2020-7951

CWE-787Published: January 27, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

meshsystem.dll in Valve Dota 2 before 7.23e 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 affected by memory corruption.

NVD Source

Technical Analysis

CVE-2020-7951 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.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

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

NO KNOWN EXPLOITNo public exploit confirmed at this time
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-2020-7951
ADVISORYhttps://github.com/bi7s/CVE/tree/master/CVE-2020-7951

All References (2)

→
https://github.com/bi7s/CVE/tree/master/CVE-2020-7951Exploit · Third Party Advisory
→
https://github.com/bi7s/CVE/tree/master/CVE-2020-7951Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-7951
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedJan 27, 2020

Related CVEs (CWE-787)

CVE-2018-17160
10.0
CVE-2019-6235
10.0
CVE-2018-6692
10.0
CVE-2018-2913
10.0
CVE-2018-3991
10.0
CVE-2019-5684
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-7951 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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