How severe is CVE-2025-6693?

CVE-2025-6693 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-6693 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6693?

CVE-2025-6693 affects Rt-thread. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6693?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-6693 have an EU (EUVD) identifier?

Yes. CVE-2025-6693 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28759.

When was CVE-2025-6693 published?

CVE-2025-6693 was published on 2025-06-26 and last updated on 2026-06-17.

CVE-2025-6693

CVE-2025-6693 is a high-severity vulnerability in Rt-thread with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
CVSS v4: 8.5
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28759
Weakness: CWE-119
Affected product: Rt-thread
Published: 2025-06-26
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, was found in RT-Thread up to 5.1.0. This affects the function sys_device_open/sys_device_read/sys_device_control/sys_device_init/sys_device_close/sys_device_write of the file components/drivers/core/device.c. The manipulation leads to memory corruption. It is possible to launch the attack on the local host. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2025-6693?: A vulnerability, which was classified as critical, was found in RT-Thread up to 5.1.0. This affects the function sys_device_open/sys_device_read/sys_device_control/sys_device_init/sys_device_close/sys_device_write of the file components/drivers/core/device.c. The manipulation leads to memory corruption. It is possible to launch the attack on the local host. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-6693?: CVE-2025-6693 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-6693 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6693?: CVE-2025-6693 affects Rt-thread. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6693?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-6693 have an EU (EUVD) identifier?: Yes. CVE-2025-6693 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28759.
When was CVE-2025-6693 published?: CVE-2025-6693 was published on 2025-06-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rt-thread:rt-thread:*:*:*:*:*:*:*:*

More vulnerabilities in Rt-thread

CVE-2024-25393 — Critical (CVSS 9.8): A stack buffer overflow occurs in net/at/src/at_server.c in RT-Thread through 5.0.2.
CVE-2024-25395 — High (CVSS 8.8): A buffer overflow occurs in utilities/rt-link/src/rtlink.c in RT-Thread through 5.0.2.
CVE-2024-25391 — High (CVSS 8.4): A stack buffer overflow occurs in libc/posix/ipc/mqueue.c in RT-Thread through 5.0.2.
CVE-2024-25390 — High (CVSS 8.4): A heap buffer overflow occurs in finsh/msh_file.c and finsh/msh.c in RT-Thread through 5.0.2.
CVE-2024-25388 — High (CVSS 8.4): drivers/wlan/wlan_mgmt,c in RT-Thread through 5.0.2 has an integer signedness error and resultant buffer overflow.
CVE-2024-24335 — High (CVSS 8.4): A heap buffer overflow occurs in the dfs_v2 romfs filesystem RT-Thread through 5.0.2.

All CVEs affecting Rt-thread →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →