CVE-2020-26887

HIGHNVD 7.87.8Elevated

7.8

FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

CVSS v3: 7.8
EG Score: 7.8(low)
EPSS: 55.7%
KEV: Not listed

Published

October 23, 2020

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://packetstormsecurity.com/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.html
cve@mitrehttps://en.avm.de/news/
cve@mitrehttps://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/159606/FRITZ-Box-7.20-DNS-Rebinding-Protection-Bypass.html
af854a3a-2127-422b-91ae-364da2661108https://en.avm.de/news/
af854a3a-2127-422b-91ae-364da2661108https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-49293
First seen Dec 18, 2020
FRITZ!Box 7.20 - DNS Rebinding Protection Bypass
Open source ↗

Frequently asked(5)

What is CVE-2020-26887?

CVE-2020-26887 is a high vulnerability published on October 23, 2020. FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

When was CVE-2020-26887 disclosed?

CVE-2020-26887 was first published in the National Vulnerability Database on October 23, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-26887 actively exploited?

CVE-2020-26887 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-26887?

CVE-2020-26887 has a CVSS v3 base score of 7.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..

How do I remediate CVE-2020-26887?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-26887, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-26887

📅 Published

🔄 Last Modified

🔗 References (6)