How severe is CVE-2017-9604?

CVE-2017-9604 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-9604 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-9604?

CVE-2017-9604 primarily affects Kde Kmail. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-9604?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-9604 published?

CVE-2017-9604 was published on 2017-06-13 and last updated on 2026-06-17.

CVE-2017-9604

CVE-2017-9604 is a high-severity vulnerability in Kde Kmail with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-311.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Kde Kmail
Published: 2017-06-13
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-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 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.
How severe is CVE-2017-9604?: CVE-2017-9604 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-9604 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-9604?: CVE-2017-9604 primarily affects Kde Kmail. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-9604?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-9604 published?: CVE-2017-9604 was published on 2017-06-13 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:kde:kmail:*:*:*:*:*:*:*:*
cpe:2.3:a:kde:messagelib:*:*:*:*:*:*:*:*

More vulnerabilities in Kde Kmail

CVE-2016-7967 — High (CVSS 8.1): KMail since version 5.3.0 used a QWebEngine based viewer that had JavaScript enabled. Since the generated html is…
CVE-2016-7966 — High (CVSS 7.3): Through a malicious URL that contained a quote character it was possible to inject HTML code in KMail's plaintext…
CVE-2020-15954 — Medium (CVSS 6.5): KDE KMail 19.12.3 (aka 5.13.3) engages in unencrypted POP3 communication during times when the UI indicates that…
CVE-2020-11880 — Medium (CVSS 6.5): An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=..."…
CVE-2016-7968 — Medium (CVSS 6.5): KMail since version 5.3.0 used a QWebEngine based viewer that had JavaScript enabled. HTML Mail contents were not…
CVE-2017-17689 — Medium (CVSS 5.9): The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to…

All CVEs affecting Kde Kmail →

Other CWE-311 (Missing Encryption of Sensitive Data) vulnerabilities

CVE-2023-6339 — Critical (CVSS 10.0): Google Nest WiFi Pro root code-execution & user-data compromise
CVE-2023-4420 — Critical (CVSS 9.8): A remote unprivileged attacker can intercept the communication via e.g. Man-In-The-Middle, due to the absence of…
CVE-2023-0750 — Critical (CVSS 9.8): Yellobrik PEC-1864 implements authentication checks via javascript in the frontend interface. When the device can be…
CVE-2020-15331 — Critical (CVSS 9.8): Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded OAUTH_SECRET_KEY in /opt/axess/etc/default/axess.
CVE-2019-3431 — Critical (CVSS 9.8): All versions up to V4.01.01.02 of ZTE ZXCLOUD GoldenData VAP product have encryption problems vulnerability. Attackers…
CVE-2019-12924 — Critical (CVSS 9.8): MailEnable Enterprise Premium 10.23 was vulnerable to XML External Entity Injection (XXE) attacks that could be…

Browse all CWE-311 (Missing Encryption of Sensitive Data) vulnerabilities →