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CVE-2025-20681

26
FAUCET Score

CVE-2025-20681 is a critical out-of-bounds write vulnerability in the WLAN AP driver affecting MediaTek and OpenWrt products. With a CVSS score of 9.8, it allows for local escalation of privilege without user interaction, requiring only user execution privileges. While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.1.0.0CPE matchmatch criteria
cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:*
19.07.0CPE matchmatch criteria
cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*
21.02.0CPE matchmatch criteria
cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
41.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 20th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

corp.mediatek.com / product-security-bulletin/July-2025
Vendor Advisory