7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.

The remote Debian 12 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4718 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4718-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Sylvain Beucler     August 05, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : 7zip     Version        : 22.01+really26.02+dfsg-0+deb12u1     CVE ID         : CVE-2026-14266 CVE-2026-58052     Debian Bug     : 1142293

    Multiple vulnerabilities were discovered in 7-Zip, a file archiver     handling multiple formats.

    Among the fixed vulnerabilities, the following were made public:

    CVE-2026-14266

        XZ decompression heap-based buffer overflow, potentially leading         to remote code execution.

    CVE-2026-58052

        RAR5 alternate-stream handling issue, when running on an NTFS         filesystem with transparent ADS (Alternate Data Stream) and ADS         canonicalization, letting an attacker defeat Mark-of-the-Web         warnings and spoof file content.

    For Debian 12 bookworm, these problems have been fixed in version     22.01+really26.02+dfsg-0+deb12u1.

    We recommend that you upgrade your 7zip packages.

    For the detailed security status of 7zip please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/7zip

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4719 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4719-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Sylvain Beucler     August 05, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : p7zip     Version        : 16.02+really26.02+dfsg-0+deb11u1                      16.02+really26.02+dfsg-0+deb12u1     CVE ID         : CVE-2026-14266 CVE-2026-58052     Debian Bug     : 1142293

    Multiple vulnerabilities were discovered in p7zip, a now unmaintained     fork of 7-Zip, which itself is a file archiver handling multiple     formats.

    To address these security vulnerabilities, whose fixes unfortunately     cannot be isolated, this update again replaces p7zip with a recent     7-Zip (now v26.02), slightly modified to make it reasonably compatible     with p7zip.

    Among the fixed vulnerabilities, the following were made public:

    CVE-2026-14266

        XZ decompression heap-based buffer overflow, potentially leading         to remote code execution.

    CVE-2026-58052

        RAR5 alternate-stream handling issue, when running on an NTFS         filesystem with transparent ADS (Alternate Data Stream) and ADS         canonicalization, letting an attacker defeat Mark-of-the-Web         warnings and spoof file content.

    For Debian 11 bullseye, these problems have been fixed in version     16.02+really26.02+dfsg-0+deb11u1.

    For Debian 12 bookworm, these problems have been fixed in version     16.02+really26.02+dfsg-0+deb12u1.

    We recommend that you upgrade your p7zip packages.

    For the detailed security status of p7zip please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/p7zip

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5     archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact     name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS     canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A     second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker     defeat SmartScreen/MotW warnings and spoof file content. (CVE-2026-58052)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of 7-Zip installed on the remote Windows host is 26.02 or earlier. It is, therefore, affected by a vulnerability:

  - 7-Zip for Windows fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its     guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while     a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream,     overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites     the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file     content. (CVE-2026-58052)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
332781	Debian dla-4718 : 7zip - security update	Nessus	Debian Local Security Checks	Local	medium
332780	Debian dla-4719 : p7zip - security update	Nessus	Debian Local Security Checks	Local	medium
326565	Linux Distros Unpatched Vulnerability : CVE-2026-58052	Nessus	Misc.	Local	medium
324932	7-Zip <= 26.02 Mark-of-the-Web Bypass (CVE-2026-58052)	Nessus	Windows	Local	medium

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CVE-2026-58052

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