Critical severity · published Oct 29, 2026
CVE-2026-111732
Out-of-bounds write when parsing AR Vendor Block requests
New
9.3
CVSS
–
EPSS
No
On KEV
Description
P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution.
This option is disabled by default.
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-2026-111732
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111732
rt-labs.com
https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf
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