CVE-2020-19323Public exploitNetwork attack vector

Router restart via unchecked SSDP ST copy

Published Sep 11, 2023 · Updated Sep 26, 2024

Heap buffer overflow in D-Link DIR-619L 2.06beta allows remote attackers to restart the router through a crafted SSDP M-SEARCH request. processSSDPrequest passes the ST parameter to SendSSDPAnnounce2, which copies it into heap space without correctly checking its length. No authentication is required; a reachable sender can crash mini_upnpd and force the device to reboot, interrupting routing service.

CVSS severity7.5
High
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in D-Link DIR-619L 2.06beta allows remote attackers to restart the router through a crafted SSDP M-SEARCH request. processSSDPrequest passes the ST parameter to SendSSDPAnnounce2, which copies it into heap space without correctly checking its length. No authentication is required; a reachable sender can crash mini_upnpd and force the device to reboot, interrupting routing service.

The record

CVE
CVE-2020-19323
Published
Sep 11, 2023
Updated
Sep 26, 2024
Vendor
D-Link Corporation
Product
DIR-619L
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=2.06beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link Corporation · DIR-619Lversion=2.06beta

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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-787Out-of-bounds Write
T1499.004Application or System Exploitation Flood

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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