High severity · published Jul 24, 2026
CVE-2026-45815
Apache NimBLE: Remote reachable assertion in ATT Read Multiple Variable Response handler
7.5
CVSS
1%
EPSS
No
On KEV
Description
Reachable Assertion vulnerability in Apache NimBLE.
A specially crafted ATT Read Multiple Variable Response (BLE_ATT_OP_READ_MULT_VAR_RSP) may trigger assert in ATT parser.
Severity is medium as this requires DUT to first send ATT Read Multiple Variable Request.
This issue affects Apache NimBLE: through 1.9.0.
Users are recommended to upgrade to version 1.10.0, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Apache NimBLE · Apache Software Foundation
through 1.9.0 · source: vendor
NI
Nimble · Apache
before 1.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45815
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45815
Patch
https://github.com/apache/mynewt-nimble/commit/fae6a4874309ba0175d2c444e20f8a6bde007425
Mailing List
https://lists.apache.org/thread/3d09hgo5zmm7dnryst3tb9857hk1bbos
Mailing List
http://www.openwall.com/lists/oss-security/2026/07/24/14
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