CVE-2026-1638
published 2026-01-30CVE-2026-1638: A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg…
PriorityP268high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
2.03%
78.7th percentile
A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg. The manipulation of the argument dmzIp results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux_kernel | >= 3.13.0 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 6.13.0 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.19.0 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.2.0 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.7.0 < 6.12.77 | 6.12.77 |
| tenda | ac21 | — | — |
| tenda | ac21 | — | — |
| tenda | ac21 | — | — |
| tenda | ac21_firmware | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.02.1LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
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OSV
wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
osv·2026-03-25
CVE-2026-23279 wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
In mesh_rx_csa_frame(), elems->mesh_chansw_params_ie is dereferenced
at lines 1638 and 1642 without a prior NULL check:
ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
...
pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
The mesh_matches_local() check above only validates the Mesh ID,
Mesh Configuration, and Supported Rates IEs. It does not verify the
presence of the Mesh Channel Switch Parameters IE (element ID 118).
When a received CSA action frame omits that IE, ieee802_11_parse_elems()
leaves elems->mesh_chansw_params_ie as NULL, and the uncondition
GHSA
GHSA-2wx5-jfx2-287m: A security flaw has been discovered in Tenda AC21 1
ghsa_unreviewed·2026-01-30
CVE-2026-1638 [MEDIUM] CWE-74 GHSA-2wx5-jfx2-287m: A security flaw has been discovered in Tenda AC21 1
A security flaw has been discovered in Tenda AC21 1.1.1.1/1.dmzip/16.03.08.16. The impacted element is the function mDMZSetCfg of the file /goform/mDMZSetCfg. The manipulation of the argument dmzIp results in command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Red Hat
kernel: wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
vendor_redhat·2026-03-25
CVE-2026-23279 CWE-476 kernel: wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
kernel: wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
In mesh_rx_csa_frame(), elems->mesh_chansw_params_ie is dereferenced
at lines 1638 and 1642 without a prior NULL check:
ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
...
pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
The mesh_matches_local() check above only validates the Mesh ID,
Mesh Configuration, and Supported Rates IEs. It does not verify the
presence of the Mesh Channel Switch Parameters IE (element ID 118).
When a received CSA action frame omits that IE, ieee802_11_parse_elems()
leaves elems->mesh_chansw_params_ie as NULL, and the uncondi
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-01-30
Published