Is CVE-2026-33662 actively exploited?

No active exploitation of CVE-2026-33662 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33662 be exploited remotely?

Yes. CVE-2026-33662 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33662?

CVE-2026-33662 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-33662

CWE-190Published: April 24, 2026· Updated: Apr 28, 2026

7.5

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:20.2th

Official Description

OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. From 3.8.0 to 4.10, in the function emsa_pkcs1_v1_5_encode() in core/drivers/crypto/crypto_api/acipher/rsassa.c, the amount of padding needed, "PS size", is calculated by subtracting the size of the digest and other fields required for the EMA-PKCS1-v1_5 encoding from the size of the modulus of the key. By selecting a small enough modulus, this subtraction can overflow. The padding is added as a string of 0xFF bytes with a call to memset(), and an underflowed integer will cause the memset() call to overwrite until OP-TEE crashes. This only affects platforms registering RSA acceleration.

NVD Source

Technical Analysis

CVE-2026-33662 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 availability disruption (denial of service), with a CVSS base score of 7.5.