Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV A L P N N N N H 6.0 .0060 47.1 —
AFFECTED Product Versions Fixed OpenBSD unspecified —
TIMELINE Jun 18 Reserved by VulnCheck Sep 8 Published (CNA: VulnCheck) Sep 10 EXPLOIT PUBLISHED — CVE-2026-56101 (OpenBSD). Public exploit reference added.
OpenBSD before commit 1ee99df contains an inverted comparison vulnerability in the ieee80211_michael_mic_failure() function within sys/net80211/ieee80211_crypto_tkip.c that allows unauthenticated attackers within RF range to trigger denial of service by sending two malformed TKIP frames separated by more than 60 seconds. Attackers can exploit the reversed TKIP MIC failure countermeasure window check to deauthenticate all associated TKIP stations and block reassociation for up to 90 seconds, while within-window MIC failures that should engage countermeasures are silently discarded, leaving key-recovery attempts undetected.
| Date | Event | Detail |
|---|---|---|
| June 18, 2026 | Reserved | Reserved by VulnCheck |
| September 8, 2026 | Published | Published (CNA: VulnCheck) |
| September 10, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-56101 (OpenBSD). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| OpenBSD | OpenBSD | — | — | — |
Authoritative record: CVE-2026-56101 at cve.org
Vendors: openbsd
Weaknesses: CWE-697
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-56101 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
