Exim vulnerabilities5 known to be exploited.
Exim has 57 published vulnerabilities across 1 product in our catalogue. 5 of them are on the list of flaws known to be exploited, so criminals are using them now. The most affected product is Exim, with 57. If you run Exim software, patch the exploited flaws first.
The most recent Exim flaw added to the known-exploited list is CVE-2010-4344, on 25 March 2022. We keep watching the known-exploited list.
Which Exim products have the most vulnerabilities?
Exim leads with 57 published vulnerabilities. Open a product to see its versions and which of its flaws criminals are already using.
Which Exim vulnerabilities are being exploited?
5 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.8Exim Heap-Based Buffer Overflow Vulnerability
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session.
- 7.8Exim Privilege Escalation Vulnerability
Exim allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands.
- 9.8Exim Out-of-bounds Write Vulnerability
Exim contains an out-of-bounds write vulnerability which can allow for remote code execution.
- 9.8Exim Mail Transfer Agent (MTA) Improper Input Validation
Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.
- 9.8Exim Buffer Overflow Vulnerability
Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution.
Which Exim flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
A flaw was found in Exim versions 4.87 to 4.91 (inclusive).
- 82%
An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1.
- 77%CVE-2025-26794High
Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allows remote SQL injection.
- 72%
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session that includes two MAIL commands in conjunction with a...
- 63%CVE-2017-16944High
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 vectors involving BDAT commands and an...
- 62%CVE-2020-28019High
Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences.
- 56%CVE-2020-28018Critical
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.
- 47%CVE-2017-16943Critical
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 vectors involving BDAT commands.
- 42%
Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846.
- 37%CVE-2020-28017Critical
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.
All Exim products we track.
1 products, most vulnerabilities first. Find the ones you run, then open a product to see its versions and exploited flaws.
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1 flaw being exploited affects software Acme tracks
Heap-based buffer overflow in the string_vformat function in string.c in Exim before 4.70 allows remote attackers to execute arbitrary code via an SMTP session.
- Matched to
- Exim on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
Our catalogue lists 57 published vulnerabilities across 1 product and 112 versions from Exim. The most recent Exim flaw added to the known-exploited list is CVE-2010-4344, on 25 March 2022.
5 Exim vulnerabilities are on the list of flaws known to be exploited. The most recently added are CVE-2010-4344, CVE-2010-4345 and CVE-2019-16928. The full list is on this page.
Exim, with 57 published vulnerabilities. Its own page lists the ones known to be exploited.
Create a EdgeProtect account and track the Exim products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook.