CVE-2019-20213Public exploitNetwork attack vector

Unauthenticated VPN configuration disclosure via newline injection

Published Jan 2, 2020 · Updated Aug 5, 2024

Authentication bypass in D-Link DIR-859 firmware before 1.07b03_beta allows remote attackers to read VPN configuration over HTTP. The phpcgi_main request handler passes newline-terminated URL parameters to the PHP interpreter, letting AUTHORIZED_GROUP be overwritten with 1. Access to the router's LAN-side web interface is required, and vpnconfig.php then returns stored VPN configuration without authentication.

CVSS severity7.5
High
EPSS probability2.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in D-Link DIR-859 firmware before 1.07b03_beta allows remote attackers to read VPN configuration over HTTP. The phpcgi_main request handler passes newline-terminated URL parameters to the PHP interpreter, letting AUTHORIZED_GROUP be overwritten with 1. Access to the router's LAN-side web interface is required, and vpnconfig.php then returns stored VPN configuration without authentication.

The record

CVE
CVE-2019-20213
Published
Jan 2, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, CWE-74
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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.

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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-863Incorrect Authorization
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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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