The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:19455 advisory.

    Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind.
    It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL     drivers and authentication plug-ins are provided as subpackages.

    Security Fix(es):

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19364 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-19149 advisory.

    - fix CVE-2026-27858: denial of service via crafted message before authentication (RHEL-161626)
    - fix CVE-2025-59032: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE     command (RHEL-162274)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:13498 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)
      * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)
      * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-611:02 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)
      * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)
      * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:17626 advisory.

    Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind.
    It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL     drivers and authentication plug-ins are provided as subpackages.

    Security Fix(es):

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:13857 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_19364 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

Tenable has extracted the preceding description block directly from the CIQ 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 Rocky Linux 10.1 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_13498 advisory.

    * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command     (CVE-2025-59032)

    * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

    * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

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

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
315556	RHEL 8 : dovecot (RHSA-2026:19455)	Nessus	Red Hat Local Security Checks	2026/5/20	2026/5/20	high
318038	RockyLinux 9 : dovecot (RLSA-2026:19364)	Nessus	Rocky Linux Local Security Checks	2026/5/30	2026/5/30	high
327491	Oracle Linux 10 : dovecot (ELSA-2026-19149)	Nessus	Oracle Linux Local Security Checks	2026/7/17	2026/7/17	high
312682	AlmaLinux 10 : dovecot (ALSA-2026:13498)	Nessus	Alma Linux Local Security Checks	2026/5/6	2026/5/6	high
314418	MiracleLinux 8 : dovecot-2.3.16-7.el8_10 (AXSA:2026-611:02)	Nessus	Miracle Linux Local Security Checks	2026/5/13	2026/5/13	high
314696	RHEL 9 : dovecot (RHSA-2026:17626)	Nessus	Red Hat Local Security Checks	2026/5/14	2026/5/14	high
313035	RockyLinux 9 : dovecot (RLSA-2026:13857)	Nessus	Rocky Linux Local Security Checks	2026/5/7	2026/5/7	high
353943	Rocky Linux 9 [CIQ] Security Update: dovecot / dovecot-debuginfo / dovecot-debugsource / dovecot-devel / etc Multiple Vulnerabilities (crlsa-2026_19364)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	high
354933	Rocky Linux 10.1 [CIQ] Security Update: dovecot / dovecot-debuginfo / dovecot-debugsource / dovecot-devel / etc Multiple Vulnerabilities (crlsa-2026_13498)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	high

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