Vendor
Exim vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 19 vulnerabilities in Exim: 0 in the last 7 days and 4 in the last 90 days, 6 of them critical and 5 exploited in the wild. The most recent, CVE-2026-94057, was published on 19 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before. 1 technology has a page of its own.
- Last 7 days
- 0
- Last 90 days
- 4
- Critical, all time
- 6
- Exploited in the wild
- 5
About Exim
Open-source message transfer agent (MTA) for routing and delivering email messages.
Exim technologies
- Exim19
Latest Exim vulnerabilities
- CVE-2026-94057: Exim SMTP smuggling in DATA phase rejection handlingmediumCVSS 4EPSS 0.2%
- CVE-2026-94056: Exim Proxy Protocol stack memory disclosurehighCVSS 7.5EPSS 0.4%
- CVE-2026-94055: Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.lowCVSS 3.7EPSS 0.3%
- CVE-2026-94054: Exim out-of-bounds write in Proxy Protocol v1highCVSS 7EPSS 0.3%
- CVE-2026-66141: Exim privilege escalation in .forward pipe transport force_commandhighCVSS 7.4
- CVE-2026-66140: Exim directory traversal in queue-name argumentshighCVSS 8.4
- CVE-2026-48840: Exim stack memory disclosure in PROXY protocol handlingmediumCVSS 5.3
- CVE-2026-45185: Exim use-after-free in BDAT body parsing with GnuTLScriticalCVSS 9.8EPSS 0.1%
- CVE-2026-40687: In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an…mediumCVSS 4.8EPSS 0.4%
- CVE-2026-40686: In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing…lowCVSS 3.7EPSS 0.3%
- CVE-2026-40685: In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator…mediumCVSS 6.5EPSS 0.3%
- CVE-2026-40684: In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when…mediumCVSS 5.9EPSS 0.4%
- CVE-2025-67896: Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow…highCVSS 7EPSS 0.5%
- CVE-2010-4344: Exim Heap-Based Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2010-4345: Exim Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2019-16928: Exim Out-of-bounds Write Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validationcriticalexploited in the wildCVSS 9.8
- CVE-2018-6789: Exim Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-1999-0971: Exim buffer overflow in .forward file processinghighCVSS 7.2
Most severe Exim vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2010-4344: Exim Heap-Based Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2019-16928: Exim Out-of-bounds Write Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validationcriticalexploited in the wildCVSS 9.8
- CVE-2018-6789: Exim Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2010-4345: Exim Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2026-45185: Exim use-after-free in BDAT body parsing with GnuTLScriticalCVSS 9.8EPSS 0.1%
- CVE-2026-66140: Exim directory traversal in queue-name argumentshighCVSS 8.4
- CVE-2026-94056: Exim Proxy Protocol stack memory disclosurehighCVSS 7.5EPSS 0.4%
- CVE-2026-66141: Exim privilege escalation in .forward pipe transport force_commandhighCVSS 7.4
- CVE-1999-0971: Exim buffer overflow in .forward file processinghighCVSS 7.2
Vulnerabilities per week
Nothing in the last four weeks, down from 4 vulnerabilities in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 4 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Exim vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/vendors/exim)<a href="https://junglewise.ai/threats/vendors/exim"><img src="https://junglewise.ai/threats/vendors/exim/badge.svg" alt="Exim vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/exim.json, and this page as text at https://junglewise.ai/threats/vendors/exim.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Exim vulnerabilities", https://junglewise.ai/threats/vendors/exim, 12 November 2026.