EX
Product
exim
by exim · last CVE Sep 19, 2026
On CISA KEVExploited in the wildRansomware-linked
70
CVEs
5
On KEV
9.8
Max CVSS
0
New 30D
Severity mix
Critical 23High 26Medium 12Low 1
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Add exim to your stack to get only the CVEs that touch what you run.

CVECVSSEPSSPublishedSummary · affected versions
CVE-2019-16928
In wildKEV
9.8
42%
Sep 27
Exim Out-of-bounds Write Vulnerability
Affected: 4.92 through 4.92.2
CVE-2019-10149
In wildKEV
9.8
100%
Jun 5
Exim Mail Transfer Agent (MTA) Improper Input Validation
Affected: 4.92
CVE-2018-6789
RansomwareIn wildKEV
9.8
82%
Feb 8
Exim Buffer Overflow Vulnerability
Affected: before 4.90.1
CVE-2010-4344
In wildKEV
9.8
72%
Dec 14
Exim Heap-Based Buffer Overflow Vulnerability
Affected: before 4.70
CVE-2010-4345
In wildKEV
7.8
18%
Dec 14
Exim Privilege Escalation Vulnerability
Affected: through 4.72
CVE-2026-45185
9.8
1%
May 12
Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path
Affected: 4.97 before 4.99.3
CVE-2026-40685
9.8
0%
Apr 30
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…
Affected: before 4.99.2
CVE-2025-67896
9.8
0%
Dec 14
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…
Affected: before 4.99.1
CVE-2025-26794
9.8
77%
Feb 21
Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allows remote SQL injection
Affected: 4.98 before 4.98.1
CVE-2023-42117
9.8
7%
May 3
Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability
Affected: before 4.96.2
CVE-2023-42116
9.8
4%
May 3
Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
Affected: before 4.96.1
CVE-2023-42115
9.8
12%
May 3
Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability
Affected: before 4.96.1
CVE-2022-3620
9.8
1%
Oct 20
Exim DMARC dmarc.c dmarc_dns_lookup use after free
Affected: 4.95 before 4.97
CVE-2022-37452
9.8
4%
Aug 7
Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set
Affected: before 4.95
CVE-2020-28026
9.8
9%
May 6
Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enable Delivery Status Notification (DSN)
Affected: 4.00 before 4.94.2
CVE-2020-28024
9.8
4%
May 6
Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back…
Affected: 4.00 before 4.94.2
CVE-2020-28022
9.8
3%
May 6
Exim 4 before 4.94.2 has Improper Restriction of Write Operations within the Bounds of a Memory Buffer
Affected: 4.00 before 4.94.2
CVE-2020-28020
9.8
8%
May 6
Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation…
Affected: 4.00 before 4.92
CVE-2020-28018
9.8
56%
May 6
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL
Affected: 4.90 before 4.94.2
CVE-2020-28017
9.8
37%
May 6
Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow in receive_add_recipient via an e-mail message with fifty million recipients
Affected: before 4.94.1
CVE-2019-15846
9.8
36%
Sep 6
Exim before 4.92.2 allows remote attackers to execute arbitrary code as root via a trailing backslash
Affected: before 4.92.2
CVE-2019-13917
9.8
9%
Jul 25
Exim 4.85 through 4.92 (fixed in 4.92.1) allows remote code execution as root in some unusual configurations that use the ${sort } expansion for items that can be controlled by an…
Affected: 4.85 through 4.92
CVE-2017-16943
9.8
47%
Nov 25
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via…
Affected: 4.88; 4.89
CVE-2026-40687
9.1
0%
Apr 30
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…
Affected: before 4.99.2
CVE-2020-28021
8.8
4%
May 6
Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters
Affected: 4.00 before 4.94.2
CVE-2026-66141
7.8
0%
Jul 24
Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled
Affected: 4.82 before 4.99.5
CVE-2026-66140
7.8
0%
Jul 24
Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and consequently gain privileges, because arguments related to queue-name are mishandled
Affected: 4.88 before 4.99.5
CVE-2025-30232
7.8
1%
Mar 28
A use-after-free in Exim 4.96 through 4.98.1 could allow users (with command-line access) to escalate privileges
Affected: 4.96 through 4.98.1
CVE-2020-28016
7.8
0%
May 6
Exim 4 before 4.94.2 allows an off-by-two Out-of-bounds Write because "-F ''" is mishandled by parse_fix_phrase
Affected: 4.00 before 4.94.2
CVE-2020-28015
7.8
0%
May 6
Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters
Affected: 4.00 before 4.94.2
CVE-2020-28013
7.8
0%
May 6
Exim 4 before 4.94.2 allows Heap-based Buffer Overflow because it mishandles "-F '.('" on the command line, and thus may allow privilege escalation from any user to root
Affected: 4.00 before 4.94.2
CVE-2020-28012
7.8
0%
May 6
Exim 4 before 4.94.2 allows Exposure of File Descriptor to Unintended Control Sphere because rda_interpret uses a privileged pipe that lacks a close-on-exec flag
Affected: 4.00 before 4.94.2
CVE-2020-28011
7.8
0%
May 6
Exim 4 before 4.94.2 allows Heap-based Buffer Overflow in queue_run via two sender options: -R and -S
Affected: 4.00 before 4.94.2
CVE-2020-28010
7.8
0%
May 6
Exim 4 before 4.94.2 allows Out-of-bounds Write because the main function, while setuid root, copies the current working directory pathname into a buffer that is too small (on…
Affected: 4.00 before 4.94.2
CVE-2020-28009
7.8
0%
May 6
Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable
Affected: 4.00 before 4.94.2
CVE-2020-28008
7.8
0%
May 6
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges
Affected: 4.00 before 4.94.2
CVE-2020-28007
7.8
1%
May 6
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges
Affected: 4.00 before 4.94.2
CVE-2020-8015
7.8
1%
Apr 2
A UNIX Symbolic Link (Symlink) Following vulnerability in the packaging of exim in openSUSE Factory allows local attackers to escalate from user mail to root
Affected: before 4.93.0.4-3.1
CVE-2026-94056
7.5
0%
Sep 19
Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory
Affected: 4.83 before 4.100.1
CVE-2026-40684
7.5
0%
Apr 30
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
Affected: before 4.99.2
CVE-2022-3559
7.5
5%
Oct 17
Exim Regex use after free
Affected: before 4.97
CVE-2022-37451
7.5
3%
Aug 6
Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc
Affected: before 4.96
CVE-2021-38371
7.5
2%
Aug 10
The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending
Affected: through 4.94.2
CVE-2020-28025
7.5
3%
May 6
Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkim_finish_bodyhash does not validate the relationship between sig->bodyhash.len and b->bh.len; thus, a crafted…
Affected: 4.00 before 4.94.2
CVE-2020-28023
7.5
3%
May 6
Exim 4 before 4.94.2 allows Out-of-bounds Read
Affected: 4.00 before 4.94.2
CVE-2020-28019
7.5
62%
May 6
Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences
Affected: 4.88 before 4.94.2
CVE-2020-12783
7.5
5%
May 11
Exim through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c
Affected: through 4.93
CVE-2017-16944
7.5
63%
Nov 25
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via…
Affected: 4.88; 4.89
CVE-2016-1531
7.0
6%
Apr 7
Exim before 4.86.2, when installed setuid root, allows local users to gain privileges via the perl_startup argument
Affected: through 4.86
CVE-2021-27216
6.3
1%
May 6
Exim 4 before 4.94.2 has Execution with Unnecessary Privileges
Affected: before 4.94.2
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