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CVE-2020-26139

An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients.
An official patch is available. Apply the patch as soon as possible.
5.3
CVSS
5.4
ShadowTrackr
NO
CISA KEV
M/H
NCSC.nl
CVSS v4.0 Metrics
Exploitability
Attack VectorAdjacent
ComplexityHigh
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch

Change Log
DateSourceChangesScore
2026-07-21PoCE: U→P2.3 → 5.4
2026-07-21nvdAV: P→A, PR: H→N, UI: A→N, VA: N→H0.0 → 2.3
2026-07-21nvdpatch: Unavailable→Official Patch0.0 → 0.0
2026-07-21cve.orginitial, patch: Unavailable0.0
References: CVE.org · NVD · NCSC · PoC

Affected Software
VendorProductVersion
aristac-100_firmwareAll versions
aristac-110_firmwareAll versions
aristac-120_firmwareAll versions
aristac-130_firmwareAll versions
aristac-200_firmwareAll versions
aristac-230_firmwareAll versions
aristac-235_firmwareAll versions
aristac-250_firmwareAll versions
aristac-260_firmwareAll versions
aristac-65_firmwareAll versions
aristac-75_firmwareAll versions
aristao-105_firmwareAll versions
aristao-90_firmwareAll versions
aristaw-118_firmwareAll versions
aristaw-68_firmwareAll versions
cisco1100_firmwareAll versions
cisco1100-4p_firmwareAll versions
cisco1100-8p_firmwareAll versions
cisco1101-4p_firmwareAll versions
cisco1109-2p_firmwareAll versions
cisco1109-4p_firmwareAll versions
ciscoaironet_1532_firmwareAll versions
ciscoaironet_1542d_firmwareAll versions
ciscoaironet_1542i_firmwareAll versions
ciscoaironet_1552_firmwareAll versions
ciscoaironet_1552h_firmwareAll versions
ciscoaironet_1572_firmwareAll versions
ciscoaironet_1702_firmwareAll versions
ciscoaironet_1800_firmwareAll versions
ciscoaironet_1800i_firmwareAll versions
ciscoaironet_1810_firmwareAll versions
ciscoaironet_1810w_firmwareAll versions
ciscoaironet_1815_firmwareAll versions
ciscoaironet_1815i_firmwareAll versions
ciscoaironet_1832_firmwareAll versions
ciscoaironet_1842_firmwareAll versions
ciscoaironet_1852_firmwareAll versions
ciscoaironet_2702_firmwareAll versions
ciscoaironet_2800_firmwareAll versions
ciscoaironet_2800e_firmwareAll versions
ciscoaironet_2800i_firmwareAll versions
ciscoaironet_3702_firmwareAll versions
ciscoaironet_3800_firmwareAll versions
ciscoaironet_3800e_firmwareAll versions
ciscoaironet_3800i_firmwareAll versions
ciscoaironet_3800p_firmwareAll versions
ciscoaironet_4800_firmwareAll versions
ciscoaironet_ap803_firmwareAll versions
ciscoaironet_iw3702_firmwareAll versions
ciscocatalyst_9105_firmwareAll versions
ciscocatalyst_9105axi_firmwareAll versions
ciscocatalyst_9105axw_firmwareAll versions
ciscocatalyst_9115_ap_firmwareAll versions
ciscocatalyst_9115_firmwareAll versions
ciscocatalyst_9115axe_firmwareAll versions
ciscocatalyst_9115axi_firmwareAll versions
ciscocatalyst_9117_ap_firmwareAll versions
ciscocatalyst_9117_firmwareAll versions
ciscocatalyst_9117axi_firmwareAll versions
ciscocatalyst_9120_ap_firmwareAll versions
ciscocatalyst_9120_firmwareAll versions
ciscocatalyst_9120axe_firmwareAll versions
ciscocatalyst_9120axi_firmwareAll versions
ciscocatalyst_9120axp_firmwareAll versions
ciscocatalyst_9124_firmwareAll versions
ciscocatalyst_9124axd_firmwareAll versions
ciscocatalyst_9124axi_firmwareAll versions
ciscocatalyst_9130_ap_firmwareAll versions
ciscocatalyst_9130_firmwareAll versions
ciscocatalyst_9130axe_firmwareAll versions
ciscocatalyst_9130axi_firmwareAll versions
ciscocatalyst_iw6300_ac_firmwareAll versions
ciscocatalyst_iw6300_dc_firmwareAll versions
ciscocatalyst_iw6300_dcw_firmwareAll versions
ciscocatalyst_iw6300_firmwareAll versions
ciscoesw6300_firmwareAll versions
ciscoip_phone_6861_firmwareAll versions
ciscoip_phone_8821_firmwareAll versions
ciscoip_phone_8832_firmwareAll versions
ciscoip_phone_8861_firmwareAll versions
ciscoip_phone_8865_firmwareAll versions
ciscoir829-2lte-ea-ak9_firmwareAll versions
ciscoir829-2lte-ea-bk9_firmwareAll versions
ciscoir829-2lte-ea-ek9_firmwareAll versions
ciscoir829gw-lte-ga-ck9_firmwareAll versions
ciscoir829gw-lte-ga-ek9_firmwareAll versions
ciscoir829gw-lte-ga-sk9_firmwareAll versions
ciscoir829gw-lte-ga-zk9_firmwareAll versions
ciscoir829gw-lte-na-ak9_firmwareAll versions
ciscoir829gw-lte-vz-ak9_firmwareAll versions
ciscomeraki_gr10_firmwareAll versions
ciscomeraki_gr60_firmwareAll versions
ciscomeraki_mr12_firmwareAll versions
ciscomeraki_mr20_firmwareAll versions
ciscomeraki_mr26_firmwareAll versions
ciscomeraki_mr30h_firmwareAll versions
ciscomeraki_mr32_firmwareAll versions
ciscomeraki_mr33_firmwareAll versions
ciscomeraki_mr34_firmwareAll versions
ciscomeraki_mr36_firmwareAll versions
ciscomeraki_mr42_firmwareAll versions
ciscomeraki_mr42e_firmwareAll versions
ciscomeraki_mr44_firmwareAll versions
ciscomeraki_mr45_firmwareAll versions
ciscomeraki_mr46_firmwareAll versions
ciscomeraki_mr46e_firmwareAll versions
ciscomeraki_mr52_firmwareAll versions
ciscomeraki_mr53_firmwareAll versions
ciscomeraki_mr53e_firmwareAll versions
ciscomeraki_mr55_firmwareAll versions
ciscomeraki_mr56_firmwareAll versions
ciscomeraki_mr62_firmwareAll versions
ciscomeraki_mr66_firmwareAll versions
ciscomeraki_mr70_firmwareAll versions
ciscomeraki_mr72_firmwareAll versions
ciscomeraki_mr74_firmwareAll versions
ciscomeraki_mr76_firmwareAll versions
ciscomeraki_mr84_firmwareAll versions
ciscomeraki_mr86_firmwareAll versions
ciscomeraki_mx64w_firmwareAll versions
ciscomeraki_mx65w_firmwareAll versions
ciscomeraki_mx67cw_firmwareAll versions
ciscomeraki_mx67w_firmwareAll versions
ciscomeraki_mx68cw_firmwareAll versions
ciscomeraki_mx68w_firmwareAll versions
ciscomeraki_z3_firmwareAll versions
ciscomeraki_z3c_firmwareAll versions
ciscowebex_board_55_firmwareAll versions
ciscowebex_board_55s_firmwareAll versions
ciscowebex_board_70_firmwareAll versions
ciscowebex_board_70s_firmwareAll versions
ciscowebex_board_85s_firmwareAll versions
ciscowebex_dx70_firmwareAll versions
ciscowebex_dx80_firmwareAll versions
ciscowebex_room_55_dual_firmwareAll versions
ciscowebex_room_55_firmwareAll versions
ciscowebex_room_70_dual_firmwareAll versions
ciscowebex_room_70_dual_g2_firmwareAll versions
ciscowebex_room_70_firmwareAll versions
ciscowebex_room_70_single_firmwareAll versions
ciscowebex_room_70_single_g2_firmwareAll versions
ciscowebex_room_kit_firmwareAll versions
ciscowebex_room_kit_mini_firmwareAll versions
debiandebian_linux9.0
intelac_8260_firmwareAll versions
intelac_8265_firmwareAll versions
intelac_9260_firmwareAll versions
intelac_9560_firmwareAll versions
intelkiller_ac_1550_firmwareAll versions
intelkiller_wi-fi_6_ax1650_firmwareAll versions
intelkiller_wi-fi_6e_ax1675_firmwareAll versions
intelproset_ac_3165_firmwareAll versions
intelproset_ac_3168_firmwareAll versions
intelproset_ac_8260_firmwareAll versions
intelproset_ac_8265_firmwareAll versions
intelproset_ac_9260_firmwareAll versions
intelproset_ac_9461_firmwareAll versions
intelproset_ac_9462_firmwareAll versions
intelproset_ac_9560_firmwareAll versions
intelproset_wi-fi_6_ax200_firmwareAll versions
intelproset_wi-fi_6_ax201_firmwareAll versions
intelproset_wi-fi_6e_ax210_firmwareAll versions
intelproset_wireless_7265_\(rev_d\)_firmwareAll versions
intelwi-fi_6_ax200_firmwareAll versions
intelwi-fi_6_ax201_firmwareAll versions
netbsdnetbsd7.1
Published: 2021-05-11