Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
CVE Vulnerability Details :
CVE-2026-40687
PUBLISHED
More InfoOfficial Page
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
View Known Exploited Vulnerability (KEV) details
Published At-30 Apr, 2026 | 00:00
Updated At-01 May, 2026 | 14:25
Rejected At-
▼CVE Numbering Authority (CNA)

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 erroneous data processing that divulges data from uninitialized heap memory.

Affected Products
Vendor
EximExim
Product
Exim
Default Status
unaffected
Versions
Affected
  • From 0 before 4.99.2 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-909CWE-909 Missing Initialization of Resource
Type: CWE
CWE ID: CWE-909
Description: CWE-909 Missing Initialization of Resource
Metrics
VersionBase scoreBase severityVector
3.14.8MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Version: 3.1
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.openwall.com/lists/oss-security/2026/04/30/21
N/A
https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40687.assessment
N/A
https://code.exim.org/exim/exim/commit/68b963b9f75ca27b38e1c0f8c87037990199f505
N/A
https://exim.org/static/doc/security/CVE-2026-40687.txt
N/A
Hyperlink: https://www.openwall.com/lists/oss-security/2026/04/30/21
Resource: N/A
Hyperlink: https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40687.assessment
Resource: N/A
Hyperlink: https://code.exim.org/exim/exim/commit/68b963b9f75ca27b38e1c0f8c87037990199f505
Resource: N/A
Hyperlink: https://exim.org/static/doc/security/CVE-2026-40687.txt
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found