VulnerabilityModified
CVE-2026-48840
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.
MEDIUM 5.3EPSS 0.26%
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.26% probability · 18th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-839
- Affected
- exim/exim
- Source
- cve@mitre.org
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1Vendor Advisory
- https://www.openwall.com/lists/oss-security/2026/05/29/3Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/29/3Mailing List, Mitigation, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.