PatchTheCVECVE-2026-20436: In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check
CVE-2026-20436 is a medium-severity flaw (CVSS 6.7) affecting nbiot sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: WCNCR00473802; Issue ID: MSV-5970.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.7 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 96%) |
| CISA exploited list | No |
| Weakness | CWE-120 |
| Published | 2026-03-02 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-20436?
nbiot sdk: upgrade to newer than 3.8. Exact commands for each OS are on this page.
Is CVE-2026-20436 being exploited?
CVE-2026-20436 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-20436 affect?
CVE-2026-20436 affects nbiot sdk. Severity is medium (CVSS 6.7). In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed f
How urgent is CVE-2026-20436?
Priority 24/100. No elevated risk signals yet.
Related CVEs
- CVE-2026-20423 HIGH 7.8 UPGRADE In wlan STA driver, there is a possible out of bounds write due to a missing bounds check
- CVE-2026-20419 MEDIUM 6.5 UPGRADE UPGRADE In wlan AP/STA firmware, there is a possible system becoming irresponsive due to an uncaught exception
- CVE-2026-20407 CRITICAL 9.3 UPGRADE In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check
- CVE-2025-20687 MEDIUM 5.5 UPGRADE In Bluetooth driver, there is a possible out of bounds read due to an incorrect bounds check
- CVE-2025-20680 CRITICAL 9.8 UPGRADE In Bluetooth driver, there is a possible out of bounds write due to an incorrect bounds check