CVE-2026-8697

Description

Due to improper enforcement of authentication rate-limiting on a debug SSH service in Archer C64 v1, the SSH service allows unlimited authentication attempts and uses the same credentials as the web interface. This enables an attacker to brute-force valid credentials via SSH. Successful exploitation could allow an attacker with adjacent network access to obtain administrative credentials through unrestricted authentication attempts and subsequently gain full administrative access to the device, impacting system confidentiality, integrity, and availability.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0051

Probability of exploitation

0.39%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-288 CWE-288

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
tp-link	archer_c64_firmware	All
tp-link	archer_c64	All

References

Advisories & Patches

https://www.tp-link.com/us/support/faq/5105/

Other References

https://www.tp-link.com/en/support/download/archer-c64/v1/#Firmware

Frequently Asked Questions

What is CVE-2026-8697? +

Due to improper enforcement of authentication rate-limiting on a debug SSH service in Archer C64 v1, the SSH service allows unlimited authentication attempts and uses the same credentials as the web interface. This enables an attacker to brute-force valid credentials via SSH. Successful exploitation could allow an attacker with adjacent network access to obtain administrative credentials through unrestricted authentication attempts and subsequently gain full administrative access to the device, impacting system confidentiality, integrity, and availability. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-8697? +

CVE-2026-8697 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0051, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-8697? +

CVE-2026-8697 affects products from tp-link, specifically: archer_c64, archer_c64_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-8697? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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