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CVE-2026-16458— Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto

Quick assessment

Affected
Oberon microsystems AG ocrypto
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Oberon microsystem AG ocrypto library是瑞士Oberon公司的一个加密库。 Oberon microsystem AG ocrypto library 3.0.0版本至4.0.1之前版本存在安全漏洞，该漏洞源于RSA PKCS#1 v1.5解密操作中的填充预言漏洞，可能导致攻击者通过时序测量恢复明文。

CVSS 5.9 · Medium EPSS 0.09% · P0

Affected Version Matrix 1

VendorProduct Version RangeStatus
Oberon microsystems AG ocrypto 3.0.0< 4.0.1 affected
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I. Basic Information for CVE-2026-16458

Vulnerability Information
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Vulnerability Title
Timing side-channel in RSA PKCS#1 v1.5 decryption in ocrypto
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Oberon microsystem AG ocrypto library 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Oberon microsystem AG ocrypto library是瑞士Oberon公司的一个加密库。 Oberon microsystem AG ocrypto library 3.0.0版本至4.0.1之前版本存在安全漏洞，该漏洞源于RSA PKCS#1 v1.5解密操作中的填充预言漏洞，可能导致攻击者通过时序测量恢复明文。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Oberon microsystems AG ocrypto 3.0.0 ~ 4.0.1 -

II. Public POCs for CVE-2026-16458

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III. Intelligence Information for CVE-2026-16458

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Vendor Advisories for CVE-2026-16458 (1)

IV. Related Vulnerabilities

Same product: ocrypto
Same vendor: Oberon microsystems AG
Same weakness: CWE-208

V. Comments for CVE-2026-16458

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