CVE-2026-9105: An authenticated stack-based buffer overflow vulnerability exists in the web management interface of TP-Link T

Q: How do I fix CVE-2026-9105?

tl-wr841n firmware: upgrade to 14_260518. Exact commands for each OS are on this page.

Q: Is CVE-2026-9105 being exploited?

CVE-2026-9105 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-2026-9105 affect?

CVE-2026-9105 affects tl-wr841n firmware. Severity is medium (CVSS 6.5). An authenticated stack-based buffer overflow vulnerability exists in the web management interface of TP-Link TL-WR841N v14. A remote authenticated attacker can send crafted HTTP requests to cause the embedded web server to overflow a stack

Q: How urgent is CVE-2026-9105?

Priority 39/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-9105 is a medium-severity flaw (CVSS 6.5) affecting tl-wr841n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authenticated stack-based buffer overflow vulnerability exists in the web management interface of TP-Link TL-WR841N v14. A remote authenticated attacker can send crafted HTTP requests to cause the embedded web server to overflow a stack buffer, resulting in a crash of the affected process. Successful exploitation results in a denial-of-service condition, causing the device to crash and automatically reboot.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2026-06-29
Last modified	2026-10-25

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

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-29 16:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

tp-link tl-wr841n firmware UPGRADE

Affected: < 14_260518

Fixed in: 14_260518

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-2026-9105?

tl-wr841n firmware: upgrade to 14_260518. Exact commands for each OS are on this page.

Is CVE-2026-9105 being exploited?

CVE-2026-9105 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-2026-9105 affect?

CVE-2026-9105 affects tl-wr841n firmware. Severity is medium (CVSS 6.5). An authenticated stack-based buffer overflow vulnerability exists in the web management interface of TP-Link TL-WR841N v14. A remote authenticated attacker can send crafted HTTP requests to cause the embedded web server to overflow a stack

How urgent is CVE-2026-9105?

Priority 39/100. No elevated risk signals yet.

Software pages

TP-Link vulnerabilities

Related CVEs

CVE-2026-5039 HIGH 8.8 UPGRADE TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived fr

References

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