CVE-2025-15551: The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any requ

Q: How do I fix CVE-2025-15551?

archer mr200 firmware: upgrade to 250917; archer c20 firmware: upgrade to 250630; tl-wr850n firmware: upgrade to 0.9.1_Build251205. Exact commands for each OS are on this page.

Q: Is CVE-2025-15551 being exploited?

CVE-2025-15551 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-2025-15551 affect?

CVE-2025-15551 affects archer mr200 firmware, archer c20 firmware, tl-wr850n firmware. Severity is medium (CVSS 5.6). The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any request is getting executed by the JavaScript function like eval directly without any check. Attackers can exploit this vulnerability

Q: How urgent is CVE-2025-15551?

Priority 34/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.6REMOTEUPGRADEUPGRADEUPGRADE

CVE-2025-15551 is a medium-severity flaw (CVSS 5.6) affecting archer mr200 firmware, archer c20 firmware, tl-wr850n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any request is getting executed by the JavaScript function like eval directly without any check. Attackers can exploit this vulnerability via a Man-in-the-Middle (MitM) attack to execute JavaScript code on the router's admin web portal without the user's permission or knowledge.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-95
Published	2026-02-05
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-02-05 18:16 UTCPublished CVE record published
2026-06-17 08:38 UTCUpdated Record last modified

tp-link archer mr200 firmware UPGRADE

Affected: < 250917

Fixed in: 250917

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.

tp-link archer c20 firmware UPGRADE

Affected: < 250630

Fixed in: 250630

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.

tp-link tl-wr850n firmware UPGRADE

Affected: < 0.9.1_Build251205

Fixed in: 0.9.1_Build251205

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.

tp-link tl-wr845n firmware UPGRADE

Affected: < 251031

Fixed in: 251031

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-2025-15551?

archer mr200 firmware: upgrade to 250917; archer c20 firmware: upgrade to 250630; tl-wr850n firmware: upgrade to 0.9.1_Build251205. Exact commands for each OS are on this page.

Is CVE-2025-15551 being exploited?

CVE-2025-15551 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-2025-15551 affect?

CVE-2025-15551 affects archer mr200 firmware, archer c20 firmware, tl-wr850n firmware. Severity is medium (CVSS 5.6). The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any request is getting executed by the JavaScript function like eval directly without any check. Attackers can exploit this vulnerability

How urgent is CVE-2025-15551?

Priority 34/100. Remotely exploitable, no login, no user action

Software pages

TP-Link vulnerabilities

References

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