What is CVE-2023-48221?

CVE-2023-48221 is a high-severity vulnerability in Wire Audio\, Video\, And Signaling, classified under Use of Externally-Controlled Format String. CVSS score: 7.3/10. Published 2023-11-20.

How severe is CVE-2023-48221?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Wire Audio\, Video\, And Signaling

CVE-2023-48221

wire-avs provides Audio, Visual, and Signaling (AVS) functionality sure the secure messaging software Wire. Prior to versions 9.2.22 and 9.3.5, a remote format string vulnerability could potentially allow an attacker to cause a denial of service or possibly execute arbitrary code. The issue has been fixed in wire-avs 9.2.22 & 9.3.5 and is already included on all Wire products. No known workarounds are available.

Published 2023-11-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Wire Audio\, Video\, And Signaling
Wireapp Wire-Avs — versions < 9.2.22, >= 9.3.0, < 9.3.5

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

github.com/wireapp/wire-avs/security/advisories/GHSA-m4xg-fcr3-w3pq (Patch, Vendor Advisory)
github.com/wireapp/wire-avs/commit/364c3326a1331a84607bce2e17126306d39150cd (Patch)

Frequently asked questions

What is CVE-2023-48221?: CVE-2023-48221 is a high-severity vulnerability in Wire Audio\, Video\, And Signaling, classified under Use of Externally-Controlled Format String. CVSS score: 7.3/10. Published 2023-11-20.
How severe is CVE-2023-48221?: High severity. CVSS v3 base score is 7.3 out of 10.