● High · CVSS 8.5

How to Fix CVE-2026-0654: Os command injection in Deco BE25 v1.0

Q: What is the CVSS score for CVE-2026-0654?

8.5 (High). Vector: `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`.

Q: Where is the official advisory for CVE-2026-0654?

The vendor advisory is at [https://www.tp-link.com/us/support/faq/4993/](https://www.tp-link.com/us/support/faq/4993/). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-0654.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-0654 is a OS command injection in TP-Link Systems Inc. Deco BE25 v1.0. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	8.5 (High)
Actively exploited?	No public listing in CISA KEV
Affected	Deco BE25 v1.0 0 to <=1.1.1 Build 20250822
Fixed in	See vendor advisory
Type (CWE)	CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

What is CVE-2026-0654?

Improper input handling in the administration web interface on TP-Link Deco BE25 v1.0 allows crafted input to be executed as part of an OS command. An authenticated adjacent attacker may execute arbitrary commands via crafted configuration file, impacting confidentiality, integrity and availability of the device.

This issue affects Deco BE25 v1.0: through 1.1.1 Build 20250822. The CVSS base score is 8.5 (High), which puts this in the upper risk band and warrants a fast patch cycle. The official advisory is at https://www.tp-link.com/us/support/faq/4993/.

Am I affected?

Check the version of Deco BE25 v1.0 you are running and compare it against the Affected row above (Deco BE25 v1.0 0 to <=1.1.1 Build 20250822). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s deco-be25-v1-0 2>/dev/null | grep -i ^Version
rpm -q deco-be25-v1-0 2>/dev/null
command -v deco-be25-v1-0 >/dev/null && deco-be25-v1-0 --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*Deco BE25 v1.0*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "Deco BE25 v1.0" 2>$null

How to fix CVE-2026-0654

Upgrade Deco BE25 v1.0 to a patched build: See vendor advisory. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade deco-be25-v1-0
dpkg -s deco-be25-v1-0 | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh deco-be25-v1-0 -y
# or for older releases:
sudo yum update deco-be25-v1-0 -y
rpm -q deco-be25-v1-0

SUSE / openSUSE


sudo zypper refresh
sudo zypper update deco-be25-v1-0
rpm -q deco-be25-v1-0

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-0654 affecting Deco BE25 v1.0
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-0654-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*Deco BE25 v1.0*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\deco-be25-v1-0-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\Deco BE25 v1.0" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "Deco BE25 v1.0" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "Deco BE25 v1.0"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-0654 affecting Deco BE25 v1.0
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-0654-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s deco-be25-v1-0 2>/dev/null | grep -i ^Version || echo "deco-be25-v1-0 not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q deco-be25-v1-0 || echo "deco-be25-v1-0 not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-0654-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/deco-be25-v1-0 /etc/deco-be25-v1-0.d /etc/deco-be25-v1-0.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: See vendor advisory)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y deco-be25-v1-0
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y deco-be25-v1-0
elif command -v yum >/dev/null; then
    yum update -y deco-be25-v1-0
elif command -v zypper >/dev/null; then
    zypper --non-interactive update deco-be25-v1-0
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s deco-be25-v1-0 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q deco-be25-v1-0
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-0654" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-0654"

Disable the affected service (Linux)


sudo systemctl stop deco-be25-v1-0 2>/dev/null || true
sudo systemctl disable deco-be25-v1-0 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s deco-be25-v1-0 2>/dev/null | grep -i ^Version
rpm -q deco-be25-v1-0 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*Deco BE25 v1.0*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above See vendor advisory. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

How to Fix CVE-2026-1315: Input Validation Flaw in Tapo C220 v1 — Input Validation Flaw in Tapo C220 v1
How to Fix CVE-2026-22228: Critical Vulnerability in Archer BE230 v1.2 — Critical Vulnerability in Archer BE230 v1.2
How to Fix CVE-2026-1571: Critical Vulnerability in Archer C60 v3 , Critical Vulnerability in Archer C60 v3
How to Fix CVE-2026-22223: Command Injection in Archer BE230 v1.2 , Command Injection in Archer BE230 v1.2
How to Fix CVE-2026-0651: Path Traversal in Tapo C260 v1 , Path Traversal in Tapo C260 v1

Is CVE-2026-0654 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-0654?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-0654?

8.5 (High). Vector: 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.

Where is the official advisory for CVE-2026-0654?

The vendor advisory is at https://www.tp-link.com/us/support/faq/4993/. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-0654.

References

Official vendor advisory: https://www.tp-link.com/us/support/faq/4993/
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0654
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Additional reference: https://www.tp-link.com/sg/support/download/deco-be25/#Firmware
Additional reference: https://www.tp-link.com/en/support/download/deco-be25/#Firmware
Additional reference: https://www.tp-link.com/us/support/download/deco-be25/v1/#Firmware

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*