CVE-2020-19319Public exploitNetwork attack vector

Unauthenticated code execution via unchecked FILECODE copy

Published Sep 11, 2023 · Updated Sep 26, 2024

Buffer overflow in D-Link DNR-202L B 2.06beta allows remote attackers to execute code through crafted unauthenticated login requests. The referenced proof of concept traces FILECODE from /goform/Login through webgetvar into getauthcode, where sprintf copies it to a local stack buffer without a length check and can overwrite the return address. Exploitation requires graphical verification-code login to be enabled; the underlying research identifies DIR-619L, while CISA later maps the record to DNR-202L, leaving that product mapping unresolved.

CVSS severity9.8
Critical
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in D-Link DNR-202L B 2.06beta allows remote attackers to execute code through crafted unauthenticated login requests. The referenced proof of concept traces FILECODE from /goform/Login through webgetvar into getauthcode, where sprintf copies it to a local stack buffer without a length check and can overwrite the return address. Exploitation requires graphical verification-code login to be enabled; the underlying research identifies DIR-619L, while CISA later maps the record to DNR-202L, leaving that product mapping unresolved.

The record

CVE
CVE-2020-19319
Published
Sep 11, 2023
Updated
Sep 26, 2024
Vendor
D-Link
Product
DNR-202L
Classifications
CWE-120, T1190
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=b_2.06beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DNR-202Lversion=b_2.06beta

Published CVSS scores

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.

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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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

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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