High severity · published Oct 29, 2026
CVE-2026-111730
Out-of-bounds write in CheckPeers block parser due to unvalidated peer station name length
New
7.2
CVSS
–
EPSS
No
On KEV
Description
P-Net before 1.0.3 does not validate the LengthPeerStationName field of a CheckPeers block in get_check_peer(). The received length (up to 255) was used to copy data into the 241-byte peer station name buffer and to place the terminating NUL byte, so a crafted block writes up to 15 bytes past the end of the buffer. This can lead to a crash (denial of service) or potentially arbitrary code execution.
Requires establishment of session that needs ADJACENT network access.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PN
P-Net · RT-Labs
before 1.0.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111730
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111730
rt-labs.com
https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf
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