Is CVE-2020-15350 actively exploited?

No active exploitation of CVE-2020-15350 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-15350 be exploited remotely?

Yes. CVE-2020-15350 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-15350?

CVE-2020-15350 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-15350

CRITICAL

CVE-2020-15350

CWE-119Published: July 7, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

RIOT 2020.04 has a buffer overflow in the base64 decoder. The decoding function base64_decode() uses an output buffer estimation function to compute the required buffer capacity and validate against the provided buffer size. The base64_estimate_decode_size() function calculates the expected decoded size with an arithmetic round-off error and does not take into account possible padding bytes. Due to this underestimation, it may be possible to craft base64 input that causes a buffer overflow.

NVD Source

Technical Analysis

CVE-2020-15350 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), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.