How severe is CVE-2017-17689?

CVE-2017-17689 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-17689 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-17689?

CVE-2017-17689 primarily affects 9folders Nine. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-17689?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-17689 published?

CVE-2017-17689 was published on 2018-05-16 and last updated on 2026-06-17.

CVE-2017-17689

CVE-2017-17689 is a medium-severity vulnerability in 9folders Nine with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: 9folders Nine
Published: 2018-05-16
Last modified: 2026-06-17

Description

The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.

Frequently asked questions

What is CVE-2017-17689?: The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.
How severe is CVE-2017-17689?: CVE-2017-17689 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-17689 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-17689?: CVE-2017-17689 primarily affects 9folders Nine. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-17689?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-17689 published?: CVE-2017-17689 was published on 2018-05-16 and last updated on 2026-06-17.

References

Affected products (21)

cpe:2.3:a:9folders:nine:-:*:*:*:*:*:*:*
cpe:2.3:a:apple:mail:-:*:*:*:*:*:*:*
cpe:2.3:a:apple:mail:-:*:*:*:*:iphone_os:*:*
cpe:2.3:a:bloop:airmail:-:*:*:*:*:*:*:*
cpe:2.3:a:emclient:emclient:-:*:*:*:*:*:*:*
cpe:2.3:a:flipdogsolutions:maildroid:-:*:*:*:*:*:*:*
cpe:2.3:a:freron:mailmate:-:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution:-:*:*:*:*:*:*:*
cpe:2.3:a:google:gmail:-:*:*:*:*:*:*:*
cpe:2.3:a:horde:horde_imp:-:*:*:*:*:*:*:*
cpe:2.3:a:ibm:notes:-:*:*:*:*:*:*:*
cpe:2.3:a:kde:kmail:-:*:*:*:*:*:*:*
cpe:2.3:a:kde:trojita:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2010:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2013:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:-:*:*:*:*:*:*:*
cpe:2.3:a:postbox-inc:postbox:-:*:*:*:*:*:*:*
cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:*
cpe:2.3:a:ritlabs:the_bat:-:*:*:*:*:*:*:*

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