How severe is CVE-2025-5867?

CVE-2025-5867 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-5867 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5867?

CVE-2025-5867 affects Rt-thread. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-5867?

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-2025-5867 have an EU (EUVD) identifier?

Yes. CVE-2025-5867 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17443.

When was CVE-2025-5867 published?

CVE-2025-5867 was published on 2025-06-09 and last updated on 2026-06-17.

CVE-2025-5867

CVE-2025-5867 is a high-severity vulnerability in Rt-thread with a CVSS 3.x base score of 8.0. 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-476.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 7.7
CVSS v4: 8.6
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-17443
Weakness: CWE-476
Affected product: Rt-thread
Published: 2025-06-09
Last modified: 2026-06-17

Description

A vulnerability classified as critical was found in RT-Thread 5.1.0. This vulnerability affects the function csys_sendto of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument to leads to null pointer dereference.

Frequently asked questions

What is CVE-2025-5867?: A vulnerability classified as critical was found in RT-Thread 5.1.0. This vulnerability affects the function csys_sendto of the file rt-thread/components/lwp/lwp_syscall.c. The manipulation of the argument to leads to null pointer dereference.
How severe is CVE-2025-5867?: CVE-2025-5867 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-5867 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5867?: CVE-2025-5867 affects Rt-thread. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-5867?: 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-2025-5867 have an EU (EUVD) identifier?: Yes. CVE-2025-5867 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17443.
When was CVE-2025-5867 published?: CVE-2025-5867 was published on 2025-06-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:rt-thread:rt-thread:5.1.0:*:*:*:*:*:*:*

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.

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