CVE-2026-16458

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

State: Published
Severity: 5.9 Medium
Published: Aug 13, 2026
Updated: Aug 13, 2026
Reserved: Jul 21, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.9 Medium	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	NCSC.ch

Weaknesses

CWE-208 Observable timing discrepancy
CWE-327

Affected Products

Product	Versions
ocryptoOberon microsystems AG	3.0.0 to before 4.0.1Affected

References

https://www.oberon.ch/security-advisories/cve-2026-16458/

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