CVE-2020-26887
HIGHCVSS 7.8/10EPSS 1.40%
Last modified
CVE-2020-26887 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.. EPSS estimates a 1.40% chance of exploitation in the next 30 days.
Description
FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Avm | Fritz\!Box 7490 Firmware | < 7.21 |
References
- http://packetstormsecurity.com/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://en.avm.de/news/Vendor Advisory
- http://packetstormsecurity.com/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.htmlExploit, Third Party Advisory, VDB Entry
- https://en.avm.de/news/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-26887?
FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.
How severe is CVE-2020-26887?
CVE-2020-26887 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.
How do I fix CVE-2020-26887?
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-2020-26887?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST