CVE-2020-29321: The D-Link router DIR-868L 3.01 is vulnerable to credentials disclosure in telnet service through decompilatio

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HIGH 7.5REMOTEMITIGATE

CVE-2020-29321 is a high-severity flaw (CVSS 7.5) affecting dir-868l firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The D-Link router DIR-868L 3.01 is vulnerable to credentials disclosure in telnet service through decompilation of firmware, that allows an unauthenticated attacker to gain access to the firmware and to extract sensitive data.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-522, CWE-798
Published	2021-06-04
Last modified	2026-06-17

Publisher (CNA): Cyber Security Works Pvt. Ltd. · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-04 20:15 UTCPublished CVE record published
2026-06-17 03:11 UTCUpdated Record last modified

dlink dir-868l firmware MITIGATE

Affected: 3.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.01

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-29321?

dir-868l firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-29321 being exploited?

CVE-2020-29321 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-29321 affect?

CVE-2020-29321 affects dir-868l firmware. Severity is high (CVSS 7.5). The D-Link router DIR-868L 3.01 is vulnerable to credentials disclosure in telnet service through decompilation of firmware, that allows an unauthenticated attacker to gain access to the firmware and to extract sensitive data.

How urgent is CVE-2020-29321?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2026-3485 CRITICAL 9.8 MITIGATE A flaw has been found in D-Link DIR-868L 110b03
CVE-2025-63932 HIGH 7.3 MITIGATE D-Link Router DIR-868L A1 FW106KRb01.bin has an unauthenticated remote code execution vulnerability in the cgi
CVE-2025-55583 CRITICAL 9.8 MITIGATE D-Link DIR-868L B1 router firmware version FW2.05WWB02 contains an unauthenticated OS command injection vulner
CVE-2023-39668 CRITICAL 9.8 MITIGATE D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the param_2 par
CVE-2023-39667 CRITICAL 9.8 MITIGATE D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the param_2 par

References

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