What’s Vulnerable › Vulnerabilities

CVE-2021-27229

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-16 · updated 2026-06-17
• Weakness: CWE-59

Description

Mumble before 1.3.4 allows remote code execution if a victim navigates to a crafted URL on a server list and clicks on the Open Webpage text.

Affected products

• Debian Linux: 9.0
• Mumble: before 1.3.4 — fixed in 1.3.4

How to fix

Upgrade to a fixed version: Mumble 1.3.4. Check the vendor advisory for mitigations.

References

• https://github.com/mumble-voip/mumble/commit/e59ee87abe249f345908c7d568f6879d16bfd648
• https://github.com/mumble-voip/mumble/compare/1.3.3...1.3.4
• https://github.com/mumble-voip/mumble/pull/4733
• https://lists.debian.org/debian-lts-announce/2021/02/msg00022.html
• https://security.gentoo.org/glsa/202105-13
• https://github.com/mumble-voip/mumble/commit/e59ee87abe249f345908c7d568f6879d16bfd648
• https://github.com/mumble-voip/mumble/compare/1.3.3...1.3.4
• https://github.com/mumble-voip/mumble/pull/4733
• https://lists.debian.org/debian-lts-announce/2021/02/msg00022.html
• https://security.gentoo.org/glsa/202105-13

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