CVE-2026-62641: In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the TNEF decoder was subject to denial of service via a crafted compressed-RTF size.

mediumCVSS 4.3CVE-2026-62641

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the TNEF decoder was subject to denial of service via a crafted compressed-RTF size.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 4.3
Published: 2026-07-14
Last updated: 2026-07-20
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-62641

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-626410.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62641	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownDSA-6391-1 roundcube - security updatedebian

Recent advisories for In Roundcube Webmail

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[UPDATE] [high] Roundcube Webmail: Multiple vulnerabilitiescert-bund · 2026-07-22
highCVE-2026-54433: In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scriptin…nvd · 2026-07-14
mediumCVE-2026-54432: Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS…nvd · 2026-07-14
mediumCVE-2026-62644: In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcub…nvd · 2026-07-14
highCVE-2026-62643: In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, insufficient Cascading Style Sheets…nvd · 2026-07-14
mediumCVE-2026-62642: In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, an infinite loop was discovered in …nvd · 2026-07-14