CVE-2019-19495Public exploitNetwork attack vector

Root-shell exposure via DNS-rebound configuration requests

Published Jan 8, 2020 · Updated Aug 5, 2024

DNS rebinding in the Technicolor TC7230 STEB 01.25 web interface allows remote attackers to expose an internal TELNET root shell. The interface accepts configuration requests from a browser after attacker-controlled DNS changes the origin address to the modem. A victim on the modem's local network must visit an attacker-controlled page; JavaScript then creates a TELNET port forward that grants external root-shell access.

CVSS severity9.8
Critical
EPSS probability4.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS rebinding in the Technicolor TC7230 STEB 01.25 web interface allows remote attackers to expose an internal TELNET root shell. The interface accepts configuration requests from a browser after attacker-controlled DNS changes the origin address to the modem. A victim on the modem's local network must visit an attacker-controlled page; JavaScript then creates a TELNET port forward that grants external root-shell access.

The record

CVE
CVE-2019-19495
Published
Jan 8, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1189Drive-by Compromise

Public exploit references

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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