CVE-2026-16348Public exploit

Root command execution via VPN key injection

Published Aug 24, 2026 · Updated Aug 25, 2026

OS command injection in TP-Link Archer BE800 V1 before 1.4.2 Build 260708 allows remote authenticated users to execute commands as root. The VPN server endpoint in vpn.lua interpolates a user-controlled key into vpn_core.sh through execute(), while its allowlist accepts shell command-substitution characters. Administrative access from an adjacent network is required; successful execution grants full control of the router and can expose credentials or enable persistent backdoors.

CVSS severity8.5
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TP-Link Archer BE800 V1 before 1.4.2 Build 260708 allows remote authenticated users to execute commands as root. The VPN server endpoint in vpn.lua interpolates a user-controlled key into vpn_core.sh through execute(), while its allowlist accepts shell command-substitution characters. Administrative access from an adjacent network is required; successful execution grants full control of the router and can expose credentials or enable persistent backdoors.

The record

CVE
CVE-2026-16348
Published
Aug 24, 2026
Updated
Aug 25, 2026
Vendor
TP-Link Systems Inc.
Product
Archer BE800
Classifications
CWE-78, CAPEC-248, T1059.004
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.4.2 Build 260708

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

TP-Link Systems Inc. · Archer BE800version=0 <1.4.2 Build 260708

Published CVSS scores

8.5TP-Link Systems Inc.CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-248Command Injection
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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