CVE-2020-26887 json
FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.
published 2020-10-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-19420
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 1
- Exploit-DB
Summary
FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.
Patch / fix
- avm fritz!box_7490_firmware 7.21
Timeline
- Published
- First public exploit (EDB-49293)
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-49293 FRITZ!Box 7.20 - DNS Rebinding Protection Bypass remote, 2020-12-18
- packetstormsecurity.com http://packetstormsecurity.com/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
References
-
packetstormsecurity.com
/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.html
exploit, third-party-advisory, vdb-entry
-
en.avm.de
/news/
vendor-advisory
-
redteam-pentesting.de
/en/advisories/-advisories-publicised-vulnerability-analyses
third-party-advisory
Sources
- CVE List CVE-2020-26887
- NVD CVE-2020-26887
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