CVE-2016-3995

mediumpriority · track · 31EPSS 0.019 · 79 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.86% (79th) EPSS

CVSS 5 · medium

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

The timing attack protection in Rijndael::Enc::ProcessAndXorBlock and Rijndael::Dec::ProcessAndXorBlock in Crypto++ (aka cryptopp) before 5.6.4 may be optimized out by the compiler, which allows attackers to conduct timing attacks.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/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.

CWE-200USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cryptopp crypto++≤ 5.6.3nvdUScpe:2.3:a:cryptopp:crypto\+\+:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2017-02-13modified 2026-06-17

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+19393 more

references (9)

External citations — patches, advisories, analysis.

http://www.openwall.com/lists/oss-security/2016/04/11/2 cnnvd
https://github.com/weidai11/cryptopp/commit/22f493dda9674df574abba300cf75d12ae62d510Patchcnnvd
https://github.com/weidai11/cryptopp/issues/146 cnnvd
http://www.openwall.com/lists/oss-security/2016/04/11/2 enisa_euvd
http://www.securityfocus.com/bid/85975 enisa_euvd
https://github.com/weidai11/cryptopp/issues/146 enisa_euvd
http://www.openwall.com/lists/oss-security/2016/04/11/2Mailing ListPatchThird Party Advisorynvd
http://www.securityfocus.com/bid/85975Third Party AdvisoryVDB Entrynvd

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