CVE-2026-5155: A vulnerability was found in Tenda CH22 1.0.0.1

This month

HIGH 8.8MITIGATE

CVE-2026-5155 is a high-severity flaw (CVSS 8.8) affecting ch22 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-119, CWE-121, CWE-787
Published	2026-03-30
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: tenda

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-30 23:17 UTCPublished CVE record published
2026-06-17 10:58 UTCUpdated Record last modified

tenda ch22 firmware MITIGATE

Affected: 1.0.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5155?

ch22 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5155 being exploited?

CVE-2026-5155 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5155 affect?

CVE-2026-5155 affects ch22 firmware. Severity is high (CVSS 8.8). A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The

How urgent is CVE-2026-5155?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2026-5962 HIGH 7.3 MITIGATE A vulnerability was detected in Tenda CH22 1.0.0.6(468)
CVE-2026-5604 HIGH 8.8 MITIGATE A security flaw has been discovered in Tenda CH22 1.0.0.1
CVE-2026-5605 HIGH 8.8 MITIGATE A weakness has been identified in Tenda CH22 1.0.0.1
CVE-2026-5154 HIGH 8.8 MITIGATE A vulnerability has been found in Tenda CH22 1.0.0.1/1.If
CVE-2026-5153 MEDIUM 6.3 MITIGATE A flaw has been found in Tenda CH22 1.0.0.1

References

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