CVE-2026-111734: RT-Labs P-Net · Out-of-bounds Read
Affects RT-Labs P-NetSource CVE Database V5
Not known to be exploited · CVSS 7.1 High : upgrade to 1.0.3 soon.
Data as of 29 Oct 2026, 16:51 UTC
Thin evidence
One scorer or none| CNA (rt-labs) | CVSS 4.0 | 7.1 |
|---|
- Patch
- Available – fixed in 1.0.3
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade RT-Labs P-Net to 1.0.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| RT-LabsP-Net | Affected
| Fixed in
|
AI-suggested
Upgrade RT-Labs P-Net to version 1.0.3 or later, where this vulnerability is fixed. No other mitigation is indicated or required according to the vendor advisory. Applying the official fix fully addresses the issue.
Description
CVE-2026-111734 is an out-of-bounds read vulnerability in RT-Labs P-Net before version 1.0.3. The vulnerability arises because the function pf_eth_recv() does not properly validate the length of received Ethernet frames before reading fields such as EtherType, VLAN tags, and PROFINET FrameID. Specifically, the VLAN tag processing loop lacks an upper bound, which can cause the function to read beyond the end of the receive buffer when processing truncated frames or frames composed solely of VLAN tags. This can lead to a denial of service via a crash or unintended disclosure of memory contents.