Medium 5.9Published Jan 28, 2022

CVE-2021-4160There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure.

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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It affects openssl and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the pre-requisites for attack are considered unlikely and include reusing private keys. 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 significant. However, for an attack on TLS to be meaningful, the server would have to share the DH private key among multiple clients, which is no longer an option since CVE-2016-0701. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0.0. It was addressed in the releases of 1.1.1m and 3.0.1 on the 15th of December 2021. For the 1.0.2 release it is addressed in git commit 6fc1aaaf3 that is available to premium support customers only. It will be made available in 1.0.2zc when it is released. The issue only affects OpenSSL on MIPS platforms. Fixed in OpenSSL 3.0.1 (Affected 3.0.0). Fixed in OpenSSL 1.1.1m (Affected 1.1.1-1.1.1l). Fixed in OpenSSL 1.0.2zc-dev (Affected 1.0.2-1.0.2zb).

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): Not given
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 17, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	from 1.0.2 through 1.0.2zb; from 1.1.1 before 1.1.1m; 3.0.0; 3.0.0; 3.0.0; 3.0.0; 3.0.0; 3.0.0; and 14 more ranges	NVD
debian debian_linux debian:debian_linux	9.0; 10.0; 11.0	NVD
oracle health_sciences_inform_publisher oracle:health_sciences_inform_publisher	6.2.1.1; 6.3.1.1	NVD
oracle jd_edwards_enterpriseone_tools oracle:jd_edwards_enterpriseone_tools	9.2.6.3	NVD
oracle jd_edwards_world_security oracle:jd_edwards_world_security	a9.4	NVD
oracle peoplesoft_enterprise_peopletools oracle:peoplesoft_enterprise_peopletools	8.58; 8.59	NVD
siemens sinec_ins siemens:sinec_ins	before 1.0; 1.0; 1.0	NVD
oracle enterprise_manager_ops_center oracle:enterprise_manager_ops_center	12.4.0.0	NVD

References

References

https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf	third-party-advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3bf7b73ea7123045b8f972badc67ed6878e6c37f
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6fc1aaaf303185aa5e483e06bdfae16daa9193a7
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e9e726506cd2a3fd9c0f12daf8cc1fe934c7dddb
https://security.gentoo.org/glsa/202210-02	third-party-advisory
https://security.netapp.com/advisory/ntap-20240621-0006/
https://www.debian.org/security/2022/dsa-5103	third-party-advisory
https://www.openssl.org/news/secadv/20220128.txt	vendor-advisory
https://www.oracle.com/security-alerts/cpuapr2022.html	patch, third-party-advisory
https://www.oracle.com/security-alerts/cpujul2022.html	third-party-advisory

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.