CVE-2025-7071

Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.

VectorLOCAL

Published Byvulnerability@ncsc.ch

Published DateAug 29, 2025, 10:15

Weakness Type (CWE):CWE-208

CVSS Metrics

Base Score

5.9

Vector String

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Base Severity

MEDIUM

Version

4.0

Attack Vector (AV)

LOCAL

Attack Complexity (AC)

HIGH

Privileges Required (PR)

NONE

User Interaction (UI)

NONE

Scope (S)

Confidentiality (C)

Integrity (I)

Availability (A)

References

https://www.oberon.ch/security-advisories/cve-2025-7071/

Base Score

MEDIUM5.9

Weakness Type (CWE):CWE-208

CVSS Metrics

Base Score

5.9

Vector String

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Base Severity

MEDIUM

Version

4.0

Attack Vector (AV)

LOCAL

Attack Complexity (AC)

HIGH

Privileges Required (PR)

NONE

User Interaction (UI)

NONE

Scope (S)

Confidentiality (C)

Integrity (I)

Availability (A)