What’s Vulnerable › Vulnerabilities

CVE-2021-41193: Use of Externally-Controlled Format String in wire-avs

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-01 · updated 2026-06-17
• Weakness: CWE-134

Description

wire-avs is the audio visual signaling (AVS) component of Wire, an open-source messenger. A remote format string vulnerability in versions prior to 7.1.12 allows an attacker to cause a denial of service or possibly execute arbitrary code. The issue has been fixed in wire-avs 7.1.12. There are currently no known workarounds.

Affected products

• wireapp wire-avs: before 7.1.12 — fixed in 7.1.12

How to fix

Upgrade to a fixed version: wireapp wire-avs 7.1.12. Check the vendor advisory for mitigations.

References

• https://github.com/wireapp/wire-avs/commit/40d373ede795443ae6f2f756e9fb1f4f4ae90bbe
• https://github.com/wireapp/wire-avs/security/advisories/GHSA-2j6v-xpf3-xvrv
• https://github.com/wireapp/wire-avs/commit/40d373ede795443ae6f2f756e9fb1f4f4ae90bbe
• https://github.com/wireapp/wire-avs/security/advisories/GHSA-2j6v-xpf3-xvrv

Get alerted when CVE-2021-41193 or the next vulnerability affects your stack