Is CVE-2026-34181 actively exploited?

No active exploitation of CVE-2026-34181 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34181 be exploited remotely?

Yes. CVE-2026-34181 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34181?

CVE-2026-34181 has a CVSS score of 7.4 (HIGH).

HOME VULNERABILITIESCVE-2026-34181

HIGH

CVE-2026-34181

CWE-354Published: June 9, 2026· Updated: Jun 15, 2026

7.4

CVSS v3.1

Official Description

Issue Summary: The PKCS#12 file processing fails to perform sufficient input

validation for files that use Password-Based Message Authentication Code 1

(PBMAC1) integrity mechanism allowing a certificate and private key forgery.

Impact Summary: An attacker impersonating a user can cause a service reading

PKCS#12 files to accept forged certificates and private keys with a 1 in 256

probability.

If a service accepting PKCS#12 files is using passwords for authenticating

the received files, the attacker can create unencrypted PKCS#12 files that

use PBMAC1 authentication that specifies an HMAC key of only one byte, allowing

them to craft a file that will be accepted with a 1 in 256 probability.

That would then cause the service to accept a certificate and private key

controlled by the attacker.

The FIPS modules are not affected by this issue, as the affected code is

outside the OpenSSL FIPS module boundary.

NVD Source

Technical Analysis

CVE-2026-34181 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.4.