7.5

CVE-2025-20666: mediatek nr15 Reachable Assertion

CVSS: 7.5v3.1HighModified
Published 05-05-2025Last modified 17-02-2026
Open JSON

Vulnerability summary

CVE-2025-20666 is a high (CVSS 7.5) Reachable Assertion vulnerability in mediatek nr15. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 56.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.83%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-05-2025
    PublishedVulnerability first disclosed.
  2. 17-02-2026
    Last modifiedVulnerability information updated.

Description

In Modem, there is a possible system crash due to an uncaught exception. 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: MOLY00650610; Issue ID: MSV-2933.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.83%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

+0.03 pp

From 0.80% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.83%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mediatek1 product

1 vendor · 1 product

References

1 links