Session hijacking via missing HttpOnly cookie flag
Published Jan 9, 2026 · Updated Jan 9, 2026
Missing HttpOnly protection in six Tenda F3 firmware builds allows remote attackers to capture administrator session cookies over insecure HTTP. The web administrative interface issues its session cookie without the HttpOnly attribute; CERT-In does not disclose the responsible handler or cookie-setting code. Exploitation requires access to a session cookie sent over an insecure HTTP connection; possession of that cookie exposes sensitive information and grants unauthorized router access.
Summary
What happened
Missing HttpOnly protection in six Tenda F3 firmware builds allows remote attackers to capture administrator session cookies over insecure HTTP. The web administrative interface issues its session cookie without the HttpOnly attribute; CERT-In does not disclose the responsible handler or cookie-setting code. Exploitation requires access to a session cookie sent over an insecure HTTP connection; possession of that cookie exposes sensitive information and grants unauthorized router access.
The record
- CVE
- CVE-2026-22081
- Published
- Jan 9, 2026
- Updated
- Jan 9, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- F3
- Classifications
- CWE-1004, T1539
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 9, 2026CVE publishedPublication date reported by the CVE source.
- Jan 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=F3 v3.0 Firmware V12.01.01.41
- Affected versionversion=F3 v3.0 Firmware V12.01.01.42
- Affected versionversion=F3 v3.0 Firmware V12.01.01.48
- Affected versionversion=F3 v3.0 Firmware V12.01.01.52
- Affected versionversion=F3 v3.0 Firmware V12.01.01.55
- Affected versionversion=F3 v4.0 Firmware V03.03.01.40
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo