What is CVE-2021-32794?

CVE-2021-32794 is a medium-severity vulnerability in Archisteamfarm Project, classified under Improper Authentication. CVSS score: 6.8/10. Published 2021-07-26.

How severe is CVE-2021-32794?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Auth bypass in Archisteamfarm Project

CVE-2021-32794

ArchiSteamFarm is a C# application with primary purpose of idling Steam cards from multiple accounts simultaneously. Due to a bug in ASF code `POST /Api/ASF` ASF API endpoint responsible for updating global ASF config incorrectly removed `IPCPassword` from the resulting config when the caller did not specify it explicitly. Due to the above, it was possible for the user to accidentally remove `IPCPassword` security measure from his IPC interface when updating global ASF config, which exists as part of global config update functionality in ASF-ui. Removal of `IPCPassword` possesses a security risk, as unauthorized users may in result access the IPC interface after such modification. The issue is patched in ASF V5.1.2.4 and future versions. We recommend to manually verify that `IPCPassword` is specified after update, and if not, set it accordingly. In default settings, ASF is configured to allow IPC access from `localhost` only and should not affect majority of users.

Vulnerability class: Broken Authentication

Published 2021-07-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Archisteamfarm Project
Justarchinet Archisteamfarm — versions < 5.1.2.4

Weakness classification (CWE)

References

github.com/JustArchiNET/ArchiSteamFarm/security/advisories/GHSA-wxx4-66c2-vj2v (Exploit, Third Party Advisory)
github.com/JustArchiNET/ArchiSteamFarm/pull/2379 (Patch, Third Party Advisory)
steamcommunity.com/groups/archiasf/discussions/6/3057365873428498659/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-32794?: CVE-2021-32794 is a medium-severity vulnerability in Archisteamfarm Project, classified under Improper Authentication. CVSS score: 6.8/10. Published 2021-07-26.
How severe is CVE-2021-32794?: Medium severity. CVSS v3 base score is 6.8 out of 10.