CVE-2025-14857
CVE-2025-14857 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.4. 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-123.
Key facts
- Severity: Medium (CVSS 4.0 base score 5.4)
- EPSS exploit prediction: 0% (15th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-209282
- Weakness: CWE-123
- Published:
- Last modified:
Description
An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.
Frequently asked questions
- What is CVE-2025-14857?
- An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.
- How severe is CVE-2025-14857?
- CVE-2025-14857 has a CVSS 4.0 base score of 5.4, rated medium severity.
- Is CVE-2025-14857 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-14857?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-14857 have an EU (EUVD) identifier?
- Yes. CVE-2025-14857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209282.
- When was CVE-2025-14857 published?
- CVE-2025-14857 was published on 2026-04-07 and last updated on 2026-06-17.
References
Other CWE-123 vulnerabilities
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- CVE-2021-38449 — Critical (CVSS 9.8): Some API functions permit by-design writing or copying data into a given buffer. Since the client controls these…
- CVE-2015-8271 — Critical (CVSS 9.8): The AMF3CD_AddProp function in amf.c in RTMPDump 2.4 allows remote RTMP Media servers to execute arbitrary code.
- CVE-2026-30121 — Critical (CVSS 9.1): remotion-dev remotion v4.0.409 was discovered to contain an arbitrary file write vulnerability.
- CVE-2026-43284 — High (CVSS 8.8): In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb…