PatchTheCVECVE-2017-9604: KDE kmail before 5.5.2 and messagelib before 5.5.2, as distributed in KDE Applications before 17.04.2, do not
CVE-2017-9604 is a high-severity flaw (CVSS 7.5) affecting kmail, messagelib. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
KDE kmail before 5.5.2 and messagelib before 5.5.2, as distributed in KDE Applications before 17.04.2, do not ensure that a plugin's sign/encrypt action occurs during use of the Send Later feature, which allows remote attackers to obtain sensitive information by sniffing the network.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-311 |
| Published | 2017-06-13 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2017-9604?
kmail: upgrade to newer than 5.5.1; messagelib: upgrade to newer than 5.5.1. Exact commands for each OS are on this page.
Is CVE-2017-9604 being exploited?
CVE-2017-9604 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2017-9604 affect?
CVE-2017-9604 affects kmail, messagelib. Severity is high (CVSS 7.5). KDE kmail before 5.5.2 and messagelib before 5.5.2, as distributed in KDE Applications before 17.04.2, do not ensure that a plugin's sign/encrypt action occurs during use of the Send Later feature, which allows remote attackers to obtain se
How urgent is CVE-2017-9604?
Priority 49/100. High severity; Remotely exploitable, no login, no user action
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