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CVE-2026-48840

CVSS 5.3 · Medium EPSS 0.03% · P8

Possible ATT&CK Techniques 1AI

T1557.002 · ARP Cache Poisoning

Affected Version Matrix 1

VendorProductVersion RangeStatus
EximExim4.88< 4.99.4affected
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I. Basic Information for CVE-2026-48840

Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行最小值检查的数值范围比较
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
EximExim 4.88 ~ 4.99.4 -

II. Public POCs for CVE-2026-48840

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III. Intelligence Information for CVE-2026-48840

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Vendor Advisories for CVE-2026-48840 (1)

Mailing List Discussions for CVE-2026-48840 (1)

IV. Related Vulnerabilities

Same product: Exim
Same vendor: Exim
Same weakness: CWE-839

V. Comments for CVE-2026-48840

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