CVE-2023-4257
Unchecked user input length in the Zephyr WiFi shell module
Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Unchecked user input length in the Zephyr WiFi shell module
Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.
- Record
CVE-2023-4257- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-120, CWE-131
- Updated
- 2026-11-02
EUVDEUVD-2023-54128
Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.
- Record
EUVD-2023-54128- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-03
NVD
Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.
- Record
CVE-2023-4257- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-120, CWE-131
- Updated
- 2026-11-02
OSV
Unchecked user input length in the Zephyr WiFi shell module
Unchecked user input length in /subsys/net/l2/wifi/wifi_shell.c can cause buffer overflows.
- Record
CVE-2023-4257- CVSS 3.1
- 7.6 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-120, CWE-131
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-4257 is a high vulnerability (CVSS 7.6) in Zephyrproject Zephyr, published October 13, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.06%, the 64th percentile. No source names a fixed version.
References
github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-853q-q69w-gf5j
openwall.com/lists/oss-security/2023/11/07/1
seclists.org/fulldisclosure/2023/Nov/1
packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html
nvd.nist.gov/vuln/detail/CVE-2023-4257