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CVE-2025-9071

Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto

LOW
2.3
CVSS Score
Published: August 29, 2025 at 09:19 AM UTC
Updated: October 18, 2026 at 09:10 PM UTC
1 product affected across 1 vendorOberon PSA Crypto

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Severity
LOW2.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG’s Oberon PSA Crypto library in all versions up to 1.5.1, results in deterministic RSA and thus in a loss of confidentiality for guessable messages, recognition of repeated messages, and loss of security proofs.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]
https://www.oberon.ch/security-advisories/cve-2025-9071/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

2.3LOWNCSC.ch
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-780

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