In Open5GS 2.4.0, a crafted packet from UE can crash SGW-U/UPF.

published 2021-12-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32228

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 4.6%; EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

Patch / fix

links 1

github.com/open5gs/open5gs@a0f2535 commit

Exploit prediction

4.59% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-1284 Improper Validation of Specified Quantity in Input

References

github.com /open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700
patch, third-party-advisory
trendmicro.com /en_us/research/23/i/attacks-on-5g-infrastructure-from-users-devices.html

Sources

CVE List CVE-2021-45462
NVD CVE-2021-45462

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary