CVE-2026-16515

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 15.7% of scored records. A rank, not a probability.

NVD base score

4.7 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-18.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-18 14:30Z1 MO AGO

Last updated

2026-09-18 16:26Z1 MO AGO

Reserved

2026-07-21

Assigning CNA

zephyr

Record state

PUBLISHED

Severity

Medium (CVSS 4.7)

CNA CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Weaknesses

• CWE-406Insufficient Control of Network Message Volume (Network Amplification)Class

Data version

5.2

Document digest

c860862d5693f008092ed0fad2eee5c31a100b6985ec8b94e027daf1592b211d

• github.comFix commithttps://github.com/zephyrproject-rtos/zephyr/commit/ba4247b24ddd3a5360b617e3ca17131ca9e8026apatch
• github.comGHSA-v5vw-m78m-h46ghttps://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-v5vw-m78m-h46g