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Vulnerability record · CVE-2014-8886 · published 8 January 2016

CVE-2014-8886: Avm fritz\! os vulnerability

Avm · Fritz\! Os

AVM FRITZ!OS before 6.30 extracts the contents of firmware updates before verifying their cryptographic signature, which allows remote attackers to create symlinks or overwrite critical files, and consequently execute arbitrary code, via a crafted firmware image.

8.1 CVSS 3.0 High EPSS 6.1% · top 6.8% CWE-310 · CWE-310
8.1CVSS 3.0 base score, v2 9.3
6.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

AVM FRITZ!OS before 6.30 extracts the contents of firmware updates before verifying their cryptographic signature, which allows remote attackers to create symlinks or overwrite critical files, and consequently execute arbitrary code, via a crafted firmware image.

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/135161/AVM-FRITZ-Box-Arbitrary-Code-Execution-Via-Firmware-Images.html
http://seclists.org/fulldisclosure/2016/Jan/12 Exploit
http://www.securityfocus.com/archive/1/537246/100/0/threaded
https://avm.de/service/sicherheitsinfos-zu-updates/ Vendor Advisory
https://www.redteam-pentesting.de/advisories/rt-sa-2014-014 Exploit
http://packetstormsecurity.com/files/135161/AVM-FRITZ-Box-Arbitrary-Code-Execution-Via-Firmware-Images.html
http://seclists.org/fulldisclosure/2016/Jan/12 Exploit
http://www.securityfocus.com/archive/1/537246/100/0/threaded
https://avm.de/service/sicherheitsinfos-zu-updates/ Vendor Advisory
https://www.redteam-pentesting.de/advisories/rt-sa-2014-014 Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.1CVE-2015-7242Avm fritz\! os cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in the Push-Service-Mails feature in AVM FRITZ!OS before 6.30 allows remote attackers to inject arbitrary we…EPSS 1.5%

Source: NIST National Vulnerability Database (record CVE-2014-8886), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.