Exim
by Exim
Source repositories
CVEs (81)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2026-94054 | Hig | 0.45 | 7.0 | 0.00 | Sep 19, 2026 | Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write. | ||
| CVE-2025-53881 | Med | 0.45 | — | 0.00 | Oct 2, 2025 | A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in the exim package allowed privilege escalation from mail user/group to root.This issue affects Tumbleweed: from ? before 4.98.2-lp156.248.1. | ||
| CVE-2026-40685 | Med | 0.42 | 6.5 | 0.00 | Apr 30, 2026 | In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping. | ||
| CVE-2021-27216 | Med | 0.41 | 6.3 | 0.01 | May 6, 2021 | Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options. | ||
| CVE-2020-28014 | Med | 0.40 | 6.1 | 0.01 | May 6, 2021 | Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. The -oP option is available to the exim user, and allows a denial of service because root-owned files can be overwritten. | ||
| CVE-2025-67896 | Hig | 0.39 | 7.0 | 0.00 | Dec 14, 2025 | Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation. | ||
| CVE-2016-9963 | Med | 0.39 | 5.9 | 0.03 | Feb 1, 2017 | Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages. | ||
| CVE-2026-40684 | Med | 0.38 | 5.9 | 0.00 | Apr 30, 2026 | In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing. | ||
| CVE-2024-39929 | Med | 0.38 | 5.4 | 0.41 | Jul 4, 2024 | Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users. | ||
| CVE-2023-42114 | Med | 0.37 | 5.3 | 0.28 | May 3, 2024 | Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists… | ||
| CVE-2022-3620 | Med | 0.36 | 5.6 | 0.01 | Oct 20, 2022 | A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is… | ||
| CVE-2023-51766 | Med | 0.35 | 5.3 | 0.01 | Dec 24, 2023 | Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because… | ||
| CVE-2026-48840 | Med | 0.34 | 5.3 | 0.00 | May 30, 2026 | Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client. | ||
| CVE-2026-40687 | Med | 0.31 | 4.8 | 0.00 | Apr 30, 2026 | In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory. | ||
| CVE-2022-3559 | Med | 0.30 | 4.6 | 0.04 | Oct 17, 2022 | A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a… | ||
| CVE-2026-94057 | Med | 0.26 | 4.0 | 0.00 | Sep 19, 2026 | 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. | ||
| CVE-2017-1000369 | Med | 0.26 | 4.0 | 0.01 | Jun 19, 2017 | Exim supports the use of multiple "-p" command line arguments which are malloc()'ed and never free()'ed, used in conjunction with other issues allows attackers to cause arbitrary code execution. This affects exim version 4.89 and earlier. Please note that at this time upstream… | ||
| CVE-2026-94055 | Low | 0.24 | 3.7 | 0.00 | Sep 19, 2026 | Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free. | ||
| CVE-2026-40686 | Low | 0.24 | 3.7 | 0.00 | Apr 30, 2026 | In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message. | ||
| CVE-2023-42119 | Low | 0.20 | 3.1 | 0.02 | May 3, 2024 | Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists… |
- risk 0.45cvss 7.0epss 0.00
Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.
- risk 0.45cvss —epss 0.00
A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in the exim package allowed privilege escalation from mail user/group to root.This issue affects Tumbleweed: from ? before 4.98.2-lp156.248.1.
- risk 0.42cvss 6.5epss 0.00
In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.
- risk 0.41cvss 6.3epss 0.01
Exim 4 before 4.94.2 has Execution with Unnecessary Privileges. By leveraging a delete_pid_file race condition, a local user can delete arbitrary files as root. This involves the -oP and -oPX options.
- risk 0.40cvss 6.1epss 0.01
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. The -oP option is available to the exim user, and allows a denial of service because root-owned files can be overwritten.
- risk 0.39cvss 7.0epss 0.00
Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.
- risk 0.39cvss 5.9epss 0.03
Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.
- risk 0.38cvss 5.9epss 0.00
In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.
- risk 0.38cvss 5.4epss 0.41
Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.
- risk 0.37cvss 5.3epss 0.28
Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists…
- risk 0.36cvss 5.6epss 0.01
A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is…
- risk 0.35cvss 5.3epss 0.01
Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because…
- risk 0.34cvss 5.3epss 0.00
Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.
- risk 0.31cvss 4.8epss 0.00
In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.
- risk 0.30cvss 4.6epss 0.04
A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a…
- risk 0.26cvss 4.0epss 0.00
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.
- risk 0.26cvss 4.0epss 0.01
Exim supports the use of multiple "-p" command line arguments which are malloc()'ed and never free()'ed, used in conjunction with other issues allows attackers to cause arbitrary code execution. This affects exim version 4.89 and earlier. Please note that at this time upstream…
- risk 0.24cvss 3.7epss 0.00
Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.
- risk 0.24cvss 3.7epss 0.00
In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message.
- risk 0.20cvss 3.1epss 0.02
Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists…
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