CVE-2026-48840
MEDIUM
5.3
CVSS Score
Published: May 30, 2026 at 01:50 AM UTC
Updated: July 22, 2026 at 06:27 AM UTC
1 product affected across 1 vendorExim
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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
Mailing ListMitigationThird Party Advisory
Source: cverecord
https://www.openwall.com/lists/oss-security/2026/05/29/3Mailing ListMitigationThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/05/29/3Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2026/06/msg00004.htmlSSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.3MEDIUMmitre
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-839
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