Medium severity · published Apr 23, 2026
CVE-2026-41989
Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt
6.7
CVSS
0.2%
EPSS
No
On KEV
Description
Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libgcrypt · gnupg
1.8.8 before 1.10.4; 1.11.0 before 1.11.3; 1.12.0 before 1.12.2 · source: vendor, NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7; V3.1.6; V3.1.5; V3.1.7 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.5; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41989
Broken Link
https://dev.gnupg.org/T8211
Third Party Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.html
Third Party Advisory
https://www.openwall.com/lists/oss-security/2026/04/21/1
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
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