USN-8991-1

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    USN-8991-1

    Published: 3 Nov 2026Last Modified: 4 Nov 2026

    Summary: rxvt-unicode vulnerability

    Details: It was discovered that rxvt-unicode incorrectly handled certain escape sequences. An attacker could possibly use this issue to execute arbitrary code if a user displayed specially crafted text in the terminal.

    References: https://ubuntu.com/security/notices/USN-8991-1, https://ubuntu.com/security/CVE-2021-33477

    Affected packages

    Package

    Name: rxvt-unicode

    Purl: pkg:deb/ubuntu/rxvt-unicode?arch=source&distro=esm-apps-legacy%2Fxenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -9.21-1ubuntu0.1~esm1

    Affected versions

    9.21-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-8991-1 | CVE-DB