Medium 5.9Published May 4, 2017

CVE-2017-3732There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d.

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

Does this affect you?

It affects openssl and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stackFree account, 3 products Every CVE for openssl Exploited in the last 30 days

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem.

CVSS: 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	1.0.2; 1.0.2; 1.0.2; 1.0.2; 1.0.2a; 1.0.2b; 1.0.2c; 1.0.2d; and 7 more ranges	NVD
nodejs node.js nodejs:node.js	from 4.0.0 through 4.1.2; from 4.2.0 before 4.7.3; from 5.0.0 through 5.12.0; from 6.0.0 through 6.8.1; from 6.9.0 before 6.9.5; from 7.0.0 before 7.5.0	NVD

References

References

http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html	patch, third-party-advisory
http://www.securityfocus.com/bid/95814	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1037717	third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHSA-2018:2185	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2186	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2187	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2568	third-party-advisory
https://access.redhat.com/errata/RHSA-2018:2575	third-party-advisory
1–10 of 18

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.