CVE-2026-16458

Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto

Published Aug 13, 2026 CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Description
Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.0.0 and prior to 4.0.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Oberon Microsystems Ag
Oberon Microsystems Ag ocrypto
Vendors & Products Oberon Microsystems Ag
Oberon Microsystems Ag ocrypto
Type Values Removed Values Added
Description Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.0.0 and prior to 4.0.1 allows an attacker to recover plaintexts via timing measurements of RSA PKCS#1 v1.5 decrypt operations.
Title Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto
Weaknesses CWE-208
CWE-327
References
Metrics cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
NCSC.ch
Published
Updated
Aug 13, 2026, 2:26 PM
Reserved
Jul 21, 2026, 11:21 AM
Status
Deferred
Published
Aug 13, 2026, 9:17 AM
Modified
Oct 23, 2026, 7:10 PM