How many CVEs does Valve Software have?

Valve Software has 41 published CVE records since 2001, including 1 in the last two years.

How many Valve Software CVEs are in CISA KEV?

None of Valve Software's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

Which Valve Software products have the most CVEs?

The Valve Software products with the most published CVEs are steam client, half-life dedicated server, half-life, dota 2, game networking sockets.

What are the most common weakness types in Valve Software CVEs?

Valve Software's CVEs most often map to these CWE weakness types: CWE-120 (Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')), CWE-121 (Stack-based Buffer Overflow), CWE-248 (Uncaught Exception), CWE-590 (Free of Memory not on the Heap).

How many critical Valve Software vulnerabilities are there?

Valve Software has 10 critical and 19 high-severity CVEs.

What is the average severity of Valve Software CVEs?

The average CVSS base score across Valve Software's scored CVEs is 7.3.

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41 CVEs

Valve Software Vulnerabilities

Name: Valve Software vulnerability dataset (CVEs)
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

CVE security advisories and vulnerability history for Valve Software.

41

Total CVEs

Published

0

In CISA KEV

Exploited in the wild

12

Public exploits

PoC or exploit code

7.3

Avg CVSS

2001–2025

Overview

Valve Software has 41 published CVE records since 2001, of which 0 are in CISA's Known Exploited Vulnerabilities catalog and 12 have a known public exploit. The average CVSS base score across scored CVEs is 7.3.

This page aggregates every publicly disclosed vulnerability (CVE) affecting Valve Software products, with severity breakdowns, the most-affected products, the most common weakness types, and the latest disclosures.

Security scorecard

A quick read on Valve Software's vulnerability posture, as a share of its 41 published CVEs.

Average CVSS: 7.3
Critical / high: 71%
Actively exploited (KEV): 0%
Public exploit available: 29%
Patch available: 37%

Severity and exploitation

How the CVSS severity of Valve Software's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.

Critical10

High19

Medium11

Low1

In CISA’s Known Exploited Vulnerabilities catalog

0

None of Valve Software's CVEs are currently listed in CISA's KEV catalog.

Public exploits

12

12 of Valve Software's CVEs have a known public exploit available.

Most affected products

The Valve Software products with the most published CVEs. Follow any product to browse its versions and vulnerabilities.

Common weakness types

The CWE weakness categories most often found in Valve Software CVEs. Follow any weakness for its full explanation.

CNAs that assign these CVEs

The CVE Numbering Authorities that publish Valve Software CVE records.

Disclosure activity by year

How many Valve Software CVEs were published each year.

2013

1

2015

2

2017

3

2019

7

2020

11

2021

1

2023

3

2025

1

Latest Valve Software CVEs

The most recently disclosed vulnerabilities affecting Valve Software.

Valve Source SDK Stack-Based Buffer Overflow RCE
CWE-121
Critical · CVSS 9.2
EPSS 0.6%2025-10-15
High vulnerability · 2023-10-15
High · CVSS 7.5
EPSS 0.8%2023-10-15
Critical vulnerability · 2023-06-19
Critical · CVSS 9.8
EPSS 1.1%2023-06-19
High vulnerability · 2023-05-23
CWE-787
High · CVSS 7.3
EPSS 0.2%2023-05-23
Critical vulnerability · 2021-04-10
Critical · CVSS 9.0
EPSS 3.5%2021-04-10
Critical vulnerability · 2020-12-03
CWE-120
Critical · CVSS 9.8
EPSS 3.1%2020-12-03
Critical vulnerability · 2020-12-02
CWE-120
Critical · CVSS 9.8
EPSS 3.1%2020-12-02
Critical vulnerability · 2020-11-18
CWE-590
Critical · CVSS 9.8
EPSS 5.8%2020-11-18
High vulnerability · 2020-11-13
CWE-248
High · CVSS 7.5
EPSS 2.8%2020-11-13
High vulnerability · 2020-07-05
High · CVSS 7.8
EPSS 0.5%2020-07-05
High vulnerability · 2020-04-27
High · CVSS 7.8
EPSS 1.1%2020-04-27
High vulnerability · 2020-02-17
High · CVSS 7.8
EPSS 2.2%2020-02-17

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Frequently asked questions

Common questions about Valve Software vulnerabilities.

How many CVEs does Valve Software have?: Valve Software has 41 published CVE records since 2001, including 1 in the last two years.
How many Valve Software CVEs are in CISA KEV?: None of Valve Software's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.
Which Valve Software products have the most CVEs?: The Valve Software products with the most published CVEs are steam client, half-life dedicated server, half-life, dota 2, game networking sockets.
What are the most common weakness types in Valve Software CVEs?: Valve Software's CVEs most often map to these CWE weakness types: CWE-120 (Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')), CWE-121 (Stack-based Buffer Overflow), CWE-248 (Uncaught Exception), CWE-590 (Free of Memory not on the Heap).
Are there public exploits for Valve Software vulnerabilities?: Yes — 12 of Valve Software's CVEs have a known public exploit.
How many critical Valve Software vulnerabilities are there?: Valve Software has 10 critical and 19 high-severity CVEs.
What is the average severity of Valve Software CVEs?: The average CVSS base score across Valve Software's scored CVEs is 7.3.

References

Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.

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