CVE-2021-42109Known exploitationNetwork attack vector

Root access via GTFO-bin and undisclosed escalation paths

Published Oct 8, 2021 · Updated Aug 4, 2024

Privilege escalation in VITEC Exterity IPTV products through 2021-04-30 allows remote attackers to gain root access over the network. The referenced disclosure states that one of three product-specific paths uses a simple GTFO-bin technique, but withholds the affected binary and the other two mechanisms. The demonstrated chain first obtained SSH or web access using default passwords, then used the flaws for full root control of the embedded Linux or CentOS system.

CVSS severity9.8
Critical
EPSS probability1.66%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in VITEC Exterity IPTV products through 2021-04-30 allows remote attackers to gain root access over the network. The referenced disclosure states that one of three product-specific paths uses a simple GTFO-bin technique, but withholds the affected binary and the other two mechanisms. The demonstrated chain first obtained SSH or web access using default passwords, then used the flaws for full root control of the embedded Linux or CentOS system.

The record

CVE
CVE-2021-42109
Published
Oct 8, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1188, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2021Exploitation reportedApril 2021 Exterity IPTV compromise demonstration
  2. Oct 8, 2021CVE publishedPublication date reported by the CVE source.
  3. 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1188Insecure Default Initialization of Resource
T1068Exploitation for Privilege Escalation

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.

Reported exploitation

Technologies

Your stack

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Your stack

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