Buffer overflow in Comfast Cf-N1-S
CVE-2026-77022
A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function sub_44B438 of the file /cgi-bin/mbox-config?method=SET§ion=ptest_ssid of the component SSID Configuration. The manipulation of the argument ssid results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.003
Affected products
- Comfast Cf-N1-S — versions 2.6.0.1
Weakness classification (CWE)
References
- vuldb.com/vuln/393637 (technical-description, vdb-entry)
- vuldb.com/vuln/393637/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-77022 (third-party-advisory)
- vuldb.com/submit/880599 (third-party-advisory)
- github.com/AdminSafe/CVE/issues/5 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-77022?
- CVE-2026-77022 is a critical-severity vulnerability in Comfast Cf-N1-S, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-08-20.
- How severe is CVE-2026-77022?
- Critical severity. CVSS v3 base score is 9.9 out of 10.