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CVE-2026-127123VulnerabilityPublished

P-Net before 1.0.4 releases the Application Relationship of an RPC session, without the abort procedure, when a

Source GCVE Database

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Authoritative record:CVE-2026-127123· Medium 6.0

Not known to be exploited · CVSS 6.0 Medium : upgrade to 1.0.4 when convenient.

Data as of 13 Nov 2026, 16:47 UTC

CVSS 4.0 base score
6.0Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (rt-labs)CVSS 4.06.0
Patch
Available – fixed in 1.0.4
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 13 Nov 2026.

What to do

Upgrade P-Net to 1.0.4.

Affected software

ProductAffectedFixed in
RT-LabsP-NetAffected
  • <1.0.4
Fixed in
  • 1.0.4

AI-suggested

A fixed version 1.0.4 or later addresses this issue. Users should upgrade to P-Net version 1.0.4 or later to remediate this vulnerability. No other mitigation or workaround is specified in the available data.

Description

P-Net versions prior to 1.0.4 have a vulnerability where the Application Relationship of an RPC session is released improperly when a request fragment uses a different data representation (endianness) than the first fragment. This causes the application to not recognize that the Application Relationship has ended, leaving resources referencing cleared structures. An attacker with adjacent network access who has observed the connection's activity UUID, which is sent in cleartext in every RPC request, can connect in place of the original host using a single PDU.

References

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