CVE-2023-51123: An issue discovered in D-Link dir815 v.1.01SSb08.bin allows a remote attacker to execute arbitrary code via a

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CRITICAL 9.8REMOTEMITIGATE

CVE-2023-51123 is a critical-severity flaw (CVSS 9.8) affecting dir-815 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue discovered in D-Link dir815 v.1.01SSb08.bin allows a remote attacker to execute arbitrary code via a crafted POST request to the service parameter in the soapcgi_main function of the cgibin binary component.

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	24.4% (top 2%)
CISA exploited list	No
Weakness	CWE-78
Published	2024-01-10
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

2024-01-10 22:15 UTCPublished CVE record published
2026-06-17 06:40 UTCUpdated Record last modified

dlink dir-815 firmware MITIGATE

Affected: 1.01ssb08.bin

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.01ssb08.bin

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · sbcl · FIXED · 2.6.10-1.fc46 · FEDORA-2026-feab1a81c6 · source

sudo dnf upgrade --advisory=FEDORA-2026-feab1a81c6

Fedora ELN · python-archspec · FIXED · 0.2.7-1.eln159 · FEDORA-2026-e2a8272db6 · source

sudo dnf upgrade --advisory=FEDORA-2026-e2a8272db6

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/WhereisRain/dir-815
Write-up: github.com/WhereisRain/dir-815/blob/main/README.md

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-2023-51123?

dir-815 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-51123 being exploited?

CVE-2023-51123 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-2023-51123 affect?

CVE-2023-51123 affects dir-815 firmware. Severity is critical (CVSS 9.8). An issue discovered in D-Link dir815 v.1.01SSb08.bin allows a remote attacker to execute arbitrary code via a crafted POST request to the service parameter in the soapcgi_main function of the cgibin binary component.

How urgent is CVE-2023-51123?

Priority 72/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-6328 HIGH 8.8 MITIGATE A vulnerability was found in D-Link DIR-815 1.01
CVE-2024-22651 CRITICAL 9.8 UPGRADE There is a command injection vulnerability in the ssdpcgi_main function of cgibin binary in D-Link DIR-815 rou

References

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