CWE · MITRE source
CWE-821Incorrect Synchronization
The product utilizes a shared resource in a concurrent manner, but it does not correctly synchronize access to the resource.
If access to a shared resource is not correctly synchronized, then the resource may not be in a state that is expected by the product. This might lead to unexpected or insecure behaviors, especially if an attacker can influence the shared resource.
Last updated: 14 October 2026 20:41 UTC
Control responseHuman-reviewed
Answering this weakness across the control lifecycle, from our framework cross-walks.
NIST 800-53 r5 controls PROPOSED for this weakness (0)AI-assisted
These are model PROPOSALS, not graded mappings. They come
from controls_to_cwe_proposals, which carries no grade field at
all; across the CWE pages 1,540 of 1,722 such associations (89%) have never
been graded by anything. The heading said “address” until
2026-09-29, which asserted a relationship the data does not carry.
Graded cross-walks are on the framework map, not here.
| Control | Title | Family | Why it addresses this CWE |
|---|---|---|---|
| No NIST controls proposed yet. | |||
Top CVEs of this weakness type, ranked by Risk Priority
| CVE | Risk | CVSS | EPSS | Published |
|---|---|---|---|---|
CVE-2026-43198 UPD | 7.2 | 9.8 | 0.0030 | 2026-05-06 |
CVE-2024-1739 UPD | 6.9 | 9.1 | 0.0056 | 2024-04-16 |
CVE-2022-1931 UPD | 6.5 | 8.1 | 0.0205 | 2022-05-31 |
CVE-2024-1902 UPD | 5.8 | 7.5 | 0.0039 | 2024-04-10 |
CVE-2026-77584 UPD | 5.2 | 7.0 | 0.0025 | 2026-08-20 |
CVE-2026-56132 | 5.0 | 6.9 | 0.0010 | 2026-06-19 |
CVE-2024-6657 UPD | 4.9 | 6.5 | 0.0020 | 2024-10-11 |
CVE-2026-21919 UPD | 4.9 | 6.5 | 0.0023 | 2026-04-09 |
CVE-2023-5088 UPD | 4.8 | 6.4 | 0.0023 | 2023-11-03 |
CVE-2024-5755 UPD | 4.4 | 5.3 | 0.0034 | 2024-06-27 |
CVE-2024-4278 UPD | 4.1 | 5.5 | 0.0023 | 2024-09-26 |
CVE-2024-58131 | 3.2 | 4.0 | 0.0027 | 2025-04-06 |
CVE-2024-58132 UPD | 3.2 | 4.0 | 0.0027 | 2025-04-06 |
CVE-2024-58133 UPD | 3.2 | 4.0 | 0.0027 | 2025-04-06 |