How severe is CVE-2021-32795?

CVE-2021-32795 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2021-32795 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32795?

CVE-2021-32795 affects Archisteamfarm Project Archisteamfarm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32795?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-32795 published?

CVE-2021-32795 was published on 2021-07-26 and last updated on 2026-06-17.

CVE-2021-32795

CVE-2021-32795 is a medium-severity vulnerability in Archisteamfarm Project Archisteamfarm with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Archisteamfarm Project Archisteamfarm
Published: 2021-07-26
Last modified: 2026-06-17

Description

ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. In versions prior to 4.3.1.0 a Denial of Service (aka DoS) vulnerability which allows attacker to remotely crash running ASF instance through sending a specifically-crafted Steam chat message exists. The user sending the message does not need to be authorized within the bot or ASF process. The attacker needs to know ASF's `CommandPrefix` in advance, but majority of ASF setups run with an unchanged default value. This attack does not allow attacker to gain any potentially-sensitive information, such as logins or passwords, does not allow to execute arbitrary commands and otherwise exploit the crash further. The issue is patched in ASF V4.3.1.0. The only workaround which guarantees complete protection is running all bots with `OnlineStatus` of `0` (Offline). In this setup, ASF is able to ignore even the specifically-crafted message without attempting to interpret it.

Frequently asked questions

What is CVE-2021-32795?: ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. In versions prior to 4.3.1.0 a Denial of Service (aka DoS) vulnerability which allows attacker to remotely crash running ASF instance through sending a specifically-crafted Steam chat message exists. The user sending the message does not need to be authorized within the bot or ASF process. The attacker needs to know ASF's `CommandPrefix` in advance, but majority of ASF setups run with an unchanged default value. This attack does not allow attacker to gain any potentially-sensitive information, such as logins or passwords, does not allow to execute arbitrary commands and otherwise exploit the crash further. The issue is patched in ASF V4.3.1.0. The only workaround which guarantees complete protection is running all bots with `OnlineStatus` of `0` (Offline). In this setup, ASF is able to ignore even the specifically-crafted message without attempting to interpret it.
How severe is CVE-2021-32795?: CVE-2021-32795 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2021-32795 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32795?: CVE-2021-32795 affects Archisteamfarm Project Archisteamfarm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32795?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-32795 published?: CVE-2021-32795 was published on 2021-07-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:archisteamfarm_project:archisteamfarm:*:*:*:*:*:*:*:*

More vulnerabilities in Archisteamfarm Project Archisteamfarm

CVE-2021-32794 — Medium (CVSS 6.8): ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously.…
CVE-2022-23627 — Medium (CVSS 5.0): ArchiSteamFarm (ASF) is a C# application with primary purpose of idling Steam cards from multiple accounts…

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