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VulnerabilityPublished

CVE-2025-14857: Semtech LR1110 · Write-what-where Condition

Affects Semtech LR1110Source CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium : upgrade to TRX FW 0x0402 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in TRX FW 0x0402, TRX FW 0x0202, TRX FW 0x0104
CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/AU:N/R:A/V:D/RE:M

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade LR1110 to TRX FW 0x0402; LR1120 to TRX FW 0x0202; LR1121 to TRX FW 0x0104.

Affected software

ProductAffectedFixed in
SemtechLR1110Affected
  • =0
Fixed in
  • TRX FW 0x0402
SemtechLR1120Affected
  • =0
Fixed in
  • TRX FW 0x0202
SemtechLR1121Affected
  • =0
Fixed in
  • TRX FW 0x0104

AI-suggested

If you cannot patch yet, restrict physical access to the SPI interface to prevent exploitation. The device's secure boot and cryptographic protections limit the impact of this vulnerability.

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.

References

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