CVE-2021-27209
HIGHCVSS 7.1/10EPSS 0.23%
Last modified
CVE-2021-27209 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. In the management interface on TP-Link Archer C5v 1.7_181221 devices, credentials are sent in a base64 format over cleartext HTTP.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.
Description
In the management interface on TP-Link Archer C5v 1.7_181221 devices, credentials are sent in a base64 format over cleartext HTTP.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tp-Link | Archer C5v Firmware | 1.7_181221 |
References
- https://gokay.org/tp-link-archer-c5v-base64-cookie/Exploit, Third Party Advisory
- https://gokay.org/tp-link-archer-c5v-base64-cookie/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-27209?
In the management interface on TP-Link Archer C5v 1.7_181221 devices, credentials are sent in a base64 format over cleartext HTTP.
How severe is CVE-2021-27209?
CVE-2021-27209 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27209?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-27209?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST