PatchTheCVECVE-2025-20647: In Modem, there is a possible system crash due to a missing bounds check
CVE-2025-20647 is a medium-severity flaw (CVSS 6.5) affecting nr12a, nr13, nr15. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY00791311 / MOLY01067019; Issue ID: MSV-2721.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-476 |
| Published | 2025-03-03 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-20647?
nr12a: mitigate or apply the listed mitigation; nr13: mitigate or apply the listed mitigation; nr15: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2025-20647 being exploited?
CVE-2025-20647 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-20647 affect?
CVE-2025-20647 affects nr12a, nr13, nr15. Severity is medium (CVSS 6.5). In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed.
How urgent is CVE-2025-20647?
Priority 30/100. No elevated risk signals yet.