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NVD / CVE Program· CNA mitre

CVE-2019-17621: The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated remote attacker to exec

Noroxi assessment

Priority: Now (action score 96/100)

  • CISA has confirmed exploitation in the wild (Jun 29, 2023). Remediation deadline for US federal agencies: Jul 20, 2023.
  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 90.6% (FIRST EPSS); higher than 99.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated remote attacker to execute system commands as root, by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
Dec 30, 2019
Updated
Jun 16, 2026
EPSS
90.6% · 99th percentile

Report tools

JSON

Action score

96

Now

Patch today or shut off access.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
27 / 30 · 90.6%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jun 29, 2023. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jul 20, 2023.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-17621

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
dlinkdir-859 firmware
dlinkdir-859
dlinkdir-822 firmware
dlinkdir-822
dlinkdir-823 firmware
dlinkdir-823
dlinkdir-865l firmware
dlinkdir-865l
dlinkdir-868l firmware
dlinkdir-868l
dlinkdir-869 firmware
dlinkdir-869

and 16 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dlink dir-818lx firmwareall versions
  • dlink dir-822 firmwareup to 2.03b01 inclusive
  • dlink dir-822 firmwareup to 3.12b04 inclusive
  • dlink dir-823 firmwareup to 1.00b06 inclusive
  • dlink dir-823 firmware1.00b06
  • dlink dir-859 firmwareup to 1.05b03 inclusive
  • dlink dir-859 firmware1.06b01
  • dlink dir-865l firmwareup to 1.07b01 inclusive
  • dlink dir-868l firmwareup to 2.05b02 inclusive
  • dlink dir-868l firmwareup to 1.12b04 inclusive
  • dlink dir-869 firmwareup to 1.03b02 inclusive
  • dlink dir-869 firmware1.03b02
  • dlink dir-880l firmwareup to 1.08b04 inclusive
  • dlink dir-885l firmwareup to 1.12b05 inclusive
  • dlink dir-885r firmwareup to 1.12b05 inclusive
  • dlink dir-890l firmwareup to 1.11b01 inclusive
  • dlink dir-890l firmware1.11b01
  • dlink dir-890r firmwareup to 1.11b01 inclusive
  • dlink dir-890r firmware1.11b01
  • dlink dir-895l firmwareup to 1.12b10 inclusive

Same product

dlink: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-0769D-Link DIR-859 HTTP POST Request hedwig.cgi path traversalKEV
    94Now
  • CVE-2019-20215D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via a urn: to the M-SEARCH method in
    62This week
  • CVE-2019-20217D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method i
    40Plan

Published before and after this one in the same product

  • Later →CVE-2019-20213Jan 2, 2020 · D-Link DIR-859 routers before v1.07b03_beta allow Unauthenticated Information Disclosure via the AUTHORIZED_GROUP=1%0a value, as demonstrate
    31Monitor
  • Later →CVE-2019-20216Jan 28, 2020 · D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method i
    40Plan
  • Later →CVE-2022-25106Mar 4, 2022 · D-Link DIR-859 v1.05 was discovered to contain a stack-based buffer overflow via the function genacgi_main.
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleexploit/linux/upnp/dlink_dir859_subscribe_execD-Link DIR-859 Unauthenticated Remote Command Executionexploit2019-12-24
Proof-of-concept repository on GitHubstars:32022-07-20

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-7 d
  2. Published
  3. First PoC+932 d
  4. CISA KEV+1276 d
  5. TodayNov 10, 2026+2506 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const host = req.body.host;exec("ping -c 1 " + host, onResult);

Fixed

ts
const host = req.body.host;if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records