CVE-2023-51764

PoC for CVE-2023-51764 SMTP SMUGGLING Postfix CVE-2023-5176525.py Description This script allows sending messages using port 25 of the mail server. Usage Before running, modify the variables: smtpserver - address of the mail server fromaddress - sender of the first email toaddress - recipient of...

CVE-2023-51764

CVE-2023-51764 Postfix SMTP Smuggling - Expect Script POC send an email that is legitimate, but inside the email there is many others emails different senders, recipients, subjet, etc. The initial email is check for SPF/DKIM/DMARC, the others inside are not ! usage: ./cve-2023-51764.sh mx.fqdn po...

CVE-2023-51764-POC

based on https://github.com/duy-31/CVE-2023-51764 and https://events.ccc.de/congress/2023/hub/en/event/smtpsmugglingspoofinge-mailsworldwide/?trk=publicpostcomment-text its just some poc port to python 3.x...

Astra Linux – Vulnerability in sendmail

Sendmail in version 8.17.2 allows for SMTP smuggling in certain configurations. Remote attackers can utilize a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, thereby bypassing an SPF protection mechanism. This issue arises because Sendmail supports...

Rocky Linux 9 [CIQ] Security Update: postfix / postfix-cdb / postfix-cdb-debuginfo / postfix-debuginfo / etc (crlsa-2024_9243)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20249243 advisory. postfix: SMTP smuggling vulnerability CVE-2023-51764 Tenable has extracted the preceding description block directly from the CIQ security advisory. Note that Nessus...

AlmaLinux 9.2 [TuxCare] Security Update: postfix / postfix-cdb / postfix-ldap / postfix-lmdb / postfix-mysql / etc (ALMALINUX9.2:CLSA-2025:1738267482)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2025:1738267482 advisory. - Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpddatarestrictions=rejectunauthpipelining and...

AlmaLinux 9.2 [TuxCare] Security Update: exim / exim-greylist / exim-mon / exim-mysql / exim-pgsql Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1790254810)

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1790254810 advisory. - Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write. CVE-2026-94054 -...

Rocky Linux 9.6 [TuxCare] Security Update: exim / exim-greylist / exim-mon / exim-mysql / exim-pgsql Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1790759113)

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790759113 advisory. - Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write. CVE-2026-94054 -...

AlmaLinux 9.6 [TuxCare] Security Update: exim / exim-greylist / exim-mon / exim-mysql / exim-pgsql Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1790759113)

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790759113 advisory. - Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write. CVE-2026-94054 -...

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Exim vulnerabilities (USN-8834-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8834-1 advisory. It was discovered that Exim had an out-of-bounds write when Proxy-Protocol was used with an attacker- controlled proxy. A remote...

Debian dsa-6526 : dovecot-auth-lua - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6526 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6526-1 [email protected] https://www.debian.org/securit...

[SECURITY] [DSA 6526-1] dovecot security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6526-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff September 28, 2026 https://www.debian.org/security/faq -...

USN-8834-1 exim4 vulnerabilities

It was discovered that Exim had an out-of-bounds write when Proxy-Protocol was used with an attacker-controlled proxy. A remote attacker could possibly use this issue to execute arbitrary code. CVE-2026-94054 It was discovered that Exim had a use-after-free when certain non-default TLS settings...

USN-8834-1: Exim vulnerabilities

It was discovered that Exim had an out-of-bounds write when Proxy-Protocol was used with an attacker-controlled proxy. A remote attacker could possibly use this issue to execute arbitrary code. CVE-2026-94054 It was discovered that Exim had a use-after-free when certain non-default TLS settings...

[SECURITY] [DSA 6522-1] exim4 security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6522-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso September 27, 2026 https://www.debian.org/security/faq -...

Debian dsa-6522 : exim4 - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6522 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6522-1 [email protected] https://www.debian.org/securit...

CVE-2026-94057

A flaw was found in Exim. A remote attacker could exploit a vulnerability known as SMTP smuggling by sending crafted data after a rejection during the DATA processing phase. This manipulation could lead to a mismatch between the intended sent message and the actual received message, potentially...

SUSE CVE-2026-94057

Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing...

EUVD-2026-83615

Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing...

Linux Distros Unpatched Vulnerability : CVE-2026-94057

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a...