CVE-2020-7879

Remote command execution via unvalidated NAS cookie

Published Nov 30, 2021 · Updated Aug 4, 2024

OS command injection in EFM Networks ipTIME C200 firmware 1.0.16 allows remote attackers to execute commands during NAS synchronization. The camera parses the setCookie('[COOKIE]') value supplied by an ipTIME NAS and passes it without validation to wget's --header option. Exploitation requires adjacent network access and a synchronization exchange with a malicious cookie; successful input runs commands on the camera.

CVSS severity8.8
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in EFM Networks ipTIME C200 firmware 1.0.16 allows remote attackers to execute commands during NAS synchronization. The camera parses the setCookie('[COOKIE]') value supplied by an ipTIME NAS and passes it without validation to wget's --header option. Exploitation requires adjacent network access and a synchronization exchange with a malicious cookie; successful input runs commands on the camera.

The record

CVE
CVE-2020-7879
Published
Nov 30, 2021
Updated
Aug 4, 2024
Vendor
EFM Networks
Product
ipTIME C200
Classifications
CWE-78, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.16 <=1.0.16

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

EFM Networks · ipTIME C200version=1.0.16 <=1.0.16

Published CVSS scores

8.8KrCERT/CCCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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