CVE-2017-17688

mediumpriority · track · 26EPSS 0.054 · 93 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

5.44% (93rd) EPSS

CVSS 4.3 · medium

Is it mine?

15 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-26

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.05.4mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

No weakness (CWE) mapping recorded.

affected products (15)

Products and version ranges known to be affected.

Open Source S/MIMEall versionscert_bundDEcpe:/a:open_source:smime:-
PGP Corporation OpenPGPall versionscert_bundDEcpe:/a:pgp:openpgp:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a n/a≤ n/aenisa_euvdEU
apple mailall versionsnvdUScpe:2.3:a:apple:mail:*:*:*:*:*:*:*:*
bloop airmailall versionsnvdUScpe:2.3:a:bloop:airmail:*:*:*:*:*:*:*:*
emclient emclientall versionsnvdUScpe:2.3:a:emclient:emclient:*:*:*:*:*:*:*:*
flipdogsolutions maildroidall versionsnvdUScpe:2.3:a:flipdogsolutions:maildroid:*:*:*:*:*:*:*:*
freron mailmateall versionsnvdUScpe:2.3:a:freron:mailmate:*:*:*:*:*:*:*:*
horde horde impall versionsnvdUScpe:2.3:a:horde:horde_imp:*:*:*:*:*:*:*:*
microsoft outlook= 2007nvdUScpe:2.3:a:microsoft:outlook:*:*:*:*:*:*:*:*
mozilla thunderbirdall versionsnvdUScpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
postbox-inc postboxall versionsnvdUScpe:2.3:a:postbox-inc:postbox:*:*:*:*:*:*:*:*
r2mail2 r2mail2all versionsnvdUScpe:2.3:a:r2mail2:r2mail2:*:*:*:*:*:*:*:*
roundcube webmailall versionsnvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1949S/MIME und OpenPGP verschlüsselten Mails: Schwachstelle ermöglicht EntschlüsselungDeutsch2018-05-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstellen in S/MIME und OpenPGP verschlüsselten Mails ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org

published 2018-05-16modified 2026-06-17

references (30)

External citations — patches, advisories, analysis.

scry

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