Vulnerability · Published Sep 28, 2026 · Assigned by VulDB

CVE-2026-101035aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception

Medium 5.3

In plain English

A medium-severity security flaw in UERANSIM from aligungr. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 63.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in aligungr UERANSIM up to 3.3.0. This affects the function DecodePlainMmMessage in the library src/lib/nas/encode.cpp of the component nr-gnb. Executing a manipulation can lead to uncaught exception. The attack can be launched remotely. The exploit has been published and may be used. This patch is called 1ae9bf2062b57595dbcbc4bc1d0a0ccf06815bac. It is best practice to apply a patch to resolve this issue.

Affected products (as reported)

Vendor	Product	Versions
aligungr	UERANSIM	3.03.13.23.3.0

Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

References

VDB-410903 | aligungr UERANSIM nr-gnb encode.cpp DecodePlainMmMessage uncaught exception vdb-entry, technical-description
VDB-410903 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-101035 | CVE Analysis and Report third-party-advisory
Submit #926089 | UERAMSIM UERANSIM nr-gnb <=3.3.0 CWE-248: Uncaught Exception third-party-advisory
https://gist.github.com/centauruszzz/f729edf89aa32ae3cfe4865c71ad1102 exploit
https://github.com/aligungr/UERANSIM/commit/1ae9bf2062b57595dbcbc4bc1d0a0ccf06815bac patch
https://github.com/aligungr/UERANSIM/ product