What is CVE-2025-27558?

CVE-2025-27558 is a critical-severity vulnerability in N/a, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2025-05-21.

How severe is CVE-2025-27558?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-27558 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in N/a

CVE-2025-27558

IEEE P802.11-REVme D1.1 through D7.0 allows FragAttacks against mesh networks. In mesh networks using Wi-Fi Protected Access (WPA, WPA2, or WPA3) or Wired Equivalent Privacy (WEP), an adversary can exploit this vulnerability to inject arbitrary frames towards devices that support receiving non-SSP A-MSDU frames. NOTE: this issue exists because of an incorrect fix for CVE-2020-24588. P802.11-REVme, as of early 2025, is a planned release of the 802.11 standard.

EPSS: 0.003 (19.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-27558?: CVE-2025-27558 is a critical-severity vulnerability in N/a, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2025-05-21.
How severe is CVE-2025-27558?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-27558 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.