CVE-2020-27853: Wire

Critical severity, CVSS 9.8. EPSS: 3.9% chance of exploitation in the next 30 days.

Wire before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a format string. This affects Wire AVS (Audio, Video, and Signaling) 5.3 through 6.x before 6.4, the Wire Secure Messenger application before 3.49.918 for Android, and the Wire Secure Messenger application before 3.61 for iOS. This occurs via the value parameter to sdp_media_set_lattr in peerflow/sdp.c.

Affected products

• Wire Wire: before 3.21.2936 (fixed in 3.21.2936); before 3.21.3932 (fixed in 3.21.3932); before 3.21.3959 (fixed in 3.21.3959)
• Wire Wire - Audio, Video, And Signaling: from 5.3, before 6.4 (fixed in 6.4)
• Wire Wire Secure Messenger: before 3.49.918 (fixed in 3.49.918); before 3.61 (fixed in 3.61)

Published 2020-10-27. Last modified 2026-06-17.