CVE-2023-51987: D-Link DIR-822+ V1.0.2 contains a login bypass in the HNAP1 interface, which allows attackers to log in to adm

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2023-51987 is a critical-severity flaw (CVSS 9.8) affecting dir-822 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

D-Link DIR-822+ V1.0.2 contains a login bypass in the HNAP1 interface, which allows attackers to log in to administrator accounts with empty passwords.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-306
Published	2024-01-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dlink

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

Am I affected?

Timeline

2024-01-11 16:15 UTCPublished CVE record published
2026-06-17 06:41 UTCUpdated Record last modified

dlink dir-822 firmware MITIGATE

Affected: 1.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.2

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-2023-51987?

dir-822 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-51987 being exploited?

CVE-2023-51987 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-2023-51987 affect?

CVE-2023-51987 affects dir-822 firmware. Severity is critical (CVSS 9.8). D-Link DIR-822+ V1.0.2 contains a login bypass in the HNAP1 interface, which allows attackers to log in to administrator accounts with empty passwords.

How urgent is CVE-2023-51987?

Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2026-7067 HIGH 7.3 MITIGATE A vulnerability was determined in D-Link DIR-822 A_101
CVE-2024-0717 MEDIUM 5.3 UPGRADE UPGRADE A vulnerability classified as critical was found in D-Link DAP-1360, DIR-300, DIR-615, DIR-615GF, DIR-615S, DI
CVE-2023-51984 CRITICAL 9.8 MITIGATE D-Link DIR-822+ V1.0.2 was found to contain a command injection in SetStaticRouteSettings function
CVE-2019-6258 CRITICAL 9.8 UPGRADE D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress d
CVE-2019-20213 HIGH 7.5 UPGRADE UPGRADE D-Link DIR-859 routers before v1.07b03_beta allow Unauthenticated Information Disclosure via the AUTHORIZED_GR

References

← Back to latest CVEs