Critical severity · published Apr 30, 2026
CVE-2026-42799
Out-of-bounds read in ulp
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Out-of-bounds read vulnerability in ASR Kestrel (nr_fw modules) allows Overflow Buffers.
This vulnerability is associated with program files Code/Nr/nr_fw/RA/src/NrPwrCtrl.C.
This issue affects Kestrel: before 2026/02/10.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kestrel · ASR
before 2026/02/10 · source: vendor
AF
Asr1803 Firmware · Asrmicro
before 1.216.002 · source: NVD