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CVE-2021-31576

24
FAUCET Score

CVE-2021-31576 describes an information disclosure vulnerability in Boa, specifically affecting MediaTek EN7528 and EN7580 firmware. This high-severity flaw (CVSS 7.5) allows a remote, unauthenticated attacker to access sensitive information without user interaction, due to a missing permission check. While the vulnerability is significant, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or notable community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< tlm7.3.275.0-64CPE matchmatch criteria
cpe:2.3:o:mediatek:en7580_firmware:*:*:*:*:*:*:*:*
< tlm7.3.275.0-64CPE matchmatch criteria
cpe:2.3:o:mediatek:en7528_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 36th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-acknowledgements
Vendor Advisory