CVE-2026-75616: An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when pr

Q: How do I fix CVE-2026-75616?

archer c20 firmware: upgrade to 0.9.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-75616 being exploited?

CVE-2026-75616 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-75616 affect?

CVE-2026-75616 affects archer c20 firmware. Severity is medium (CVSS 6.8). An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when processing certain WAN-related configuration operations. An authenticated administrator may exploit insufficient input validation to

Q: How urgent is CVE-2026-75616?

Priority 45/100. No elevated risk signals yet.

This month

MEDIUM 6.8UPGRADE

CVE-2026-75616 is a medium-severity flaw (CVSS 6.8) affecting archer c20 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when processing certain WAN-related configuration operations. An authenticated administrator may exploit insufficient input validation to execute arbitrary system commands, potentially resulting in full device compromise. Successful exploitation may allow arbitrary command execution with elevated privileges, compromising the confidentialit

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.8% (top 13%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-08-19
Last modified	2026-09-08

Publisher (CNA): TPLink · Vendor: tp-link

Last updated 2026-09-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 21:17 UTCPublished CVE record published
2026-09-08 21:12 UTCUpdated Record last modified

tp-link archer c20 firmware UPGRADE

Affected: < 0.9.1

Fixed in: 0.9.1

Safe to downgrade to: no unaffected older release

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-2026-75616?

archer c20 firmware: upgrade to 0.9.1. Exact commands for each OS are on this page.

Is CVE-2026-75616 being exploited?

CVE-2026-75616 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-2026-75616 affect?

CVE-2026-75616 affects archer c20 firmware. Severity is medium (CVSS 6.8). An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when processing certain WAN-related configuration operations. An authenticated administrator may exploit insufficient input validation to

How urgent is CVE-2026-75616?

Priority 45/100. No elevated risk signals yet.

Software pages

TP-Link vulnerabilities

References

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