CVE-2020-7949Public exploitNetwork attack vector

Code execution via crafted map pointer arithmetic

Published Jan 27, 2020 · Updated Aug 4, 2024

Memory corruption in Valve Dota 2 before 7.23f allows remote attackers to execute code or crash the client through a crafted map. BinaryProperties_GetValue in schemasystem.dll adds attacker-controlled map values to form a pointer, then dereferences it and triggers an access violation. Exploitation requires the victim to join an attacker-controlled game server or launch a malicious custom map; successful abuse can compromise or crash the client.

CVSS severity7.8
High
EPSS probability4.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Valve Dota 2 before 7.23f allows remote attackers to execute code or crash the client through a crafted map. BinaryProperties_GetValue in schemasystem.dll adds attacker-controlled map values to form a pointer, then dereferences it and triggers an access violation. Exploitation requires the victim to join an attacker-controlled game server or launch a malicious custom map; successful abuse can compromise or crash the client.

The record

CVE
CVE-2020-7949
Published
Jan 27, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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