Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Exim Exim unaffected
Version Status Constraints
4.82 affected < 4.99.5

No data.

No data.

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Vendors Products
Exim Subscribe
Exim Subscribe

Project Subscriptions

Vendors Products
Exim Subscribe
Exim Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://openwall.com/lists/oss-security/2026/07/22/9 cve-icon
History

Fri, 24 Jul 2026 04:45:00 +0000

Type Values Removed Values Added
Description Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.
First Time appeared Exim
Exim exim
Weaknesses CWE-829
CPEs cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*
Vendors & Products Exim
Exim exim
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-24T04:37:46.099Z

Reserved: 2026-07-24T04:37:45.699Z

Link: CVE-2026-66141

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-24T05:30:05Z

Weaknesses