Which products and versions are affected by CVE-2021-21816?

Affected: Dir-3040 Firmware (Dlink) versions 1.13b03; D-LINK versions >= D-LINK DIR-3040 1.13B03. The full list is in the CVE brief.

Is CVE-2021-21816 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-21816 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-21816?

No public exploit code is known.

Is there a fix for CVE-2021-21816?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2021-21816 be patched?

Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

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Vulnerability Intelligence

CVE-2021-21816

Medium

An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03.

Published Jul 16, 2021 · Updated Nov 21, 2024

Key Facts

Routine patching

CVE-2021-21816 is a medium-severity vulnerability (CVSS 4.3 v3.1) affecting Dir-3040 Firmware (Dlink), D-LINK.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 32% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

CVSS v3.1

4.3

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

EPSS (30-day exploit likelihood)

32%

Higher than 98.3% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2021-21816 brief as a PDF

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Description

An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to the disclosure of sensitive information. An attacker can send an HTTP request to trigger this vulnerability.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Dir-3040 FirmwareDlink	1.13b03	n/a
D-LINK	>= D-LINK DIR-3040 1.13B03	n/a

Timeline

Publicly disclosed
Jul 16, 2021
Last updated
Nov 21, 2024

Weakness Type

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

exploithttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1281

FAQ

Common Questions.

An information disclosure vulnerability exists in the Syslog functionality of D-LINK DIR-3040 1.13B03.
Affected: Dir-3040 Firmware (Dlink) versions 1.13b03; D-LINK versions >= D-LINK DIR-3040 1.13B03. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

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