Low 2.6Published May 31, 2011

CVE-2011-1945The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly…

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

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The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.

CVSS: 2.6 LOW (v2.0, NVD)AV:N/AC:H/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-310
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	through 1.0.0d; 0.9.1c; 0.9.2b; 0.9.3; 0.9.3a; 0.9.4; 0.9.5; 0.9.5; and 70 more ranges	NVD

References

References

http://eprint.iacr.org/2011/232.pdf	exploit
http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
http://secunia.com/advisories/44935
http://support.apple.com/kb/HT5784
http://www.debian.org/security/2011/dsa-2309
http://www.kb.cert.org/vuls/id/536044	us-government-resource
http://www.kb.cert.org/vuls/id/MAPG-8FENZ3	us-government-resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:136
http://www.mandriva.com/security/advisories?name=MDVSA-2011:137
https://hermes.opensuse.org/messages/8760466
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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.