In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00277.

Exploitation none

Automatable no

Technical Impact partial

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

Vendor Product Default status Versions
Roundcube Webmail unaffected
Version Status Constraints
1.6.0 affected < 1.6.17
1.7.0 affected < 1.7.2

No data.

No data.

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Vendors Products
Roundcube Subscribe
Webmail Subscribe

Project Subscriptions

Vendors Products
Roundcube Subscribe
Webmail Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4693-1 roundcube security update
Debian DSA Debian DSA DSA-6391-1 roundcube security update
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/roundcube/roundcubemail/commit/132ac8dd5a55c8466be12de1daf84355697ffa89 cve-icon
https://github.com/roundcube/roundcubemail/commit/877269c79359d959a94f13c9070cab0f3389c193 cve-icon
https://github.com/roundcube/roundcubemail/commit/a007321346380136b3de2bd75b486b04f63c0d38 cve-icon
https://github.com/roundcube/roundcubemail/commit/fb952956c6eaf29e963f1a718d028d66e7957ce0 cve-icon
https://github.com/roundcube/roundcubemail/releases/tag/1.6.17 cve-icon
https://github.com/roundcube/roundcubemail/releases/tag/1.7.2 cve-icon
https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 cve-icon
History

Sat, 01 Aug 2026 10:15:00 +0000

Type Values Removed Values Added
Title Infinite Loop in Roundcube TNEF Decoder Causes Denial of Service

Wed, 29 Jul 2026 06:00:00 +0000

Type Values Removed Values Added
Title Infinite Loop in Roundcube TNEF Decoder Causes Denial of Service

Sun, 26 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Title Infinite Loop in TNEF Decoder Causes Denial of Service

Thu, 23 Jul 2026 02:45:00 +0000

Type Values Removed Values Added
Title Infinite Loop in TNEF Decoder Causes Denial of Service

Mon, 20 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
Title Infinite Loop in TNEF Decoder Causing Denial of Service in Roundcube Webmail

Thu, 16 Jul 2026 07:30:00 +0000

Type Values Removed Values Added
Title Infinite Loop in TNEF Decoder Causing Denial of Service in Roundcube Webmail

Tue, 14 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
Description In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.
First Time appeared Roundcube
Roundcube webmail
Weaknesses CWE-835
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Vendors & Products Roundcube
Roundcube webmail
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-14T17:18:18.192Z

Reserved: 2026-07-14T15:49:17.389Z

Link: CVE-2026-62642

cve-icon Vulnrichment

Updated: 2026-07-14T17:18:07.614Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-01T10:00:04Z

Weaknesses