Is CVE-2021-3476 actively exploited?

CVE-2021-3476 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-3476?

CVE-2021-3476 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

How do I patch CVE-2021-3476?

Patch guidance is available from openexr security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-3476.

CVE-2021-3476 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-3476?

4 products: openexr openexr, openexr openexr, debian debian linux, debian debian linux.

Description

A flaw was found in OpenEXR's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to OpenEXR could trigger shift overflows, potentially affecting application availability.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: CWE-190 · Integer Overflow

Metadata

Primary Vendor: OPENEXR
Published: 3/30/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

openexr : openexropenexr : openexrdebian : debian_linuxdebian : debian_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-3476. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-3476

View on NIST NVD

CVE-2021-3476 vulnerability