Roundcube Webmail up to 1.6.16/1.7.1 TNEF Decoder infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k1.40+

Summaryinfo

A vulnerability, which was classified as problematic, was found in Roundcube Webmail up to 1.6.16/1.7.1. Affected is an unknown function of the component TNEF Decoder. The manipulation results in infinite loop. This vulnerability is identified as CVE-2026-62642. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Roundcube Webmail up to 1.6.16/1.7.1. It has been classified as problematic. Affected is some unknown functionality of the component TNEF Decoder. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at roundcube.net. This vulnerability is traded as CVE-2026-62642 since 07/14/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.6.17 or 1.7.2 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Webmail 1.6.17/1.7.2

Timelineinfo

07/14/2026 Advisory disclosed
07/14/2026 +0 days CVE reserved
07/14/2026 +0 days VulDB entry created
07/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: roundcube.net
Status: Confirmed

CVE: CVE-2026-62642 (🔒)
GCVE (CVE): GCVE-0-2026-62642
GCVE (VulDB): GCVE-100-378366

Entryinfo

Created: 07/14/2026 18:52
Changes: 07/14/2026 18:52 (54)
Complete: 🔍
Cache ID: 216::103

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