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TI-2026-83621 Aliases CVE-2026-120228GHSA-cfhj-2xf7-r697

WAVLINK WN553X1-B ioos Service sub_416D88 OS command injection

Priority HIGH 76CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

WAVLINK WN553X1-B firmware V260403_2.0.0 contains an OS command injection flaw in the function sub_416D88 of the file /bin/ioos in the ioos Service component. The function does not neutralize special elements in the group_id and group_name arguments, which is tracked as CWE-78. A remote attacker can run arbitrary OS commands with low privileges. A public exploit has been published and may be used.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

A flaw has been found in WAVLINK WN553X1-B V260403_2.0.0. This vulnerability affects the function sub_416D88 of the file /bin/ioos of the component ioos Service. Executing a manipulation of the argument group_id/group_name can lead to os command injection. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01652 76th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WavlinkWN553X1-BV260403_2.0.0—No fix listedCNA
  • WN553X1-B VendorWavlink Affected V260403_2.0.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:wavlink:wn553x1-b:*:*:*:*:*:*:*:*——Wavlink
  • cpe:2.3:a:wavlink:wn553x1-b:*:*:*:*:*:*:*:* Versions — — ·Wavlink

Remediation

The sources list no fixed version for WAVLINK WN553X1-B.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-11-01 Threatist record created from CVE-2026-120228
  2. 2026-11-01 Alias added: GHSA-cfhj-2xf7-r697
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: MEDIUM → HIGH

References

Exploit 1

  • TI-2022-02298 WAVLINK WN535K2/WN535K3 nightled.cgi os command injection CVSS 3.1CRITICAL 9.8
  • TI-2026-83752 OS command injection in WAVLINK WN551X3-A DNS resolution handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83751 WAVLINK WN551X3-A WireGuard CLI Group ioos os command injection CVSS 4.0CRITICAL 10.0
  • TI-2026-83668 Stack-based overflow in WAVLINK WN536AX6-A OpenVPN handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83667 OS command injection in WAVLINK WN536AX6-A WireGuard handler CVSS 4.0CRITICAL 10.0
  • TI-2026-83666 OS command injection in WAVLINK WN536AX6-A openvpn_cli handler CVSS 4.0CRITICAL 10.0
See all 248 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences