Technology · Zephyr
Zephyr OS vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 12 vulnerabilities in Zephyr OS: 3 in the last 7 days and 12 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-91007, was published on 12 November 2026. 7 vulnerabilities in the last four weeks, up 250% on the four before (2).
- Last 7 days
- 3
- Last 90 days
- 12
- Critical, all time
- 0
- Exploited in the wild
- 0
About Zephyr OS
Real-time operating system for embedded and IoT devices.
Latest Zephyr OS vulnerabilities
- CVE-2026-91007: Zephyr charger driver kernel privilege escalation via user-mode syscall verificationhighCVSS 7.8
- CVE-2026-90589: Zephyr kernel thread stack memory leak via k_thread_abortmediumCVSS 5.5EPSS 0.1%
- CVE-2026-90587: Zephyr USB host stack null pointer dereference in device enumerationmediumCVSS 4.6EPSS 0.2%
- CVE-2026-87044: Mbed TLS crypto shim driver heap exhaustion via unaborted PSA operationsmediumCVSS 6.5
- CVE-2026-87039: Zephyr I2S user-mode syscall verifier unvalidated pointer dereferencehighCVSS 7.8
- CVE-2026-85033: Zephyr AVRCP Target vendor response buffer leak on disconnectionmediumCVSS 4.6
- CVE-2026-82389: Zephyr Bluetooth Classic HFP AG stack crash on RFCOMM connection failuremediumCVSS 6.5
- CVE-2026-82388: Zephyr HFP Hands-Free connection denial of servicemediumCVSS 5.3
- CVE-2026-81038: Zephyr Object Transfer Service OACP checksum uninitialized memory disclosurehighCVSS 7.1
- CVE-2026-79981: Zephyr DNS resolver predictable source port and transaction IDmediumCVSS 6.5
- CVE-2026-19737: Zephyr i2s_esp32 null pointer dereference in trigger validationmediumCVSS 5.5EPSS 0.1%
- CVE-2026-17053: Zephyr SMBus syscall privilege escalation in callback removalmediumCVSS 4.4EPSS 0.1%
Most severe Zephyr OS vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-91007: Zephyr charger driver kernel privilege escalation via user-mode syscall verificationhighCVSS 7.8
- CVE-2026-87039: Zephyr I2S user-mode syscall verifier unvalidated pointer dereferencehighCVSS 7.8
- CVE-2026-81038: Zephyr Object Transfer Service OACP checksum uninitialized memory disclosurehighCVSS 7.1
- CVE-2026-87044: Mbed TLS crypto shim driver heap exhaustion via unaborted PSA operationsmediumCVSS 6.5
- CVE-2026-82389: Zephyr Bluetooth Classic HFP AG stack crash on RFCOMM connection failuremediumCVSS 6.5
- CVE-2026-79981: Zephyr DNS resolver predictable source port and transaction IDmediumCVSS 6.5
- CVE-2026-90589: Zephyr kernel thread stack memory leak via k_thread_abortmediumCVSS 5.5EPSS 0.1%
- CVE-2026-19737: Zephyr i2s_esp32 null pointer dereference in trigger validationmediumCVSS 5.5EPSS 0.1%
- CVE-2026-82388: Zephyr HFP Hands-Free connection denial of servicemediumCVSS 5.3
- CVE-2026-90587: Zephyr USB host stack null pointer dereference in device enumerationmediumCVSS 4.6EPSS 0.2%
Vulnerabilities per week
7 vulnerabilities in the last four weeks, up 250% on the four before (2). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 1 | 0 | |
| 5 Oct 2026 | 1 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 1 | 0 | |
| 26 Oct 2026 | 3 | 0 | |
| 2 Nov 2026 | 3 | 0 | |
| 9 Nov 2026 | 3 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Zephyr OS vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/zephyr-zephyr-os)<a href="https://junglewise.ai/threats/technologies/zephyr-zephyr-os"><img src="https://junglewise.ai/threats/technologies/zephyr-zephyr-os/badge.svg" alt="Zephyr OS vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/zephyr-zephyr-os.json, and this page as text at https://junglewise.ai/threats/technologies/zephyr-zephyr-os.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Zephyr OS vulnerabilities", https://junglewise.ai/threats/technologies/zephyr-zephyr-os, 13 November 2026.