CVE-2026-62644
CVE-2026-62644 Vulnerability Analysis & Exploit Intelligence
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.
Published Updated Sources: cvelistV5, mitre
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
1%
chance of exploitation in 30 days
CVSS base
6.4
MEDIUM
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 6.4 | CVSS 3.1 | MEDIUM | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-290
Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.
- T1134Access Token Manipulation
- T1528Steal Application Access Token
- T1539Steal Web Session Cookie
References
7 on the record
- roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2
reference
- github.com/roundcube/roundcubemail/releases/tag/1.7.2
reference
- github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d
reference
- github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923
reference
- github.com/roundcube/roundcubemail/releases/tag/1.6.17
reference
- github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476
reference
- github.com/roundcube/roundcubemail/commit/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c
reference
Elsewhere on this site
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.