CVE-2018-18907: An issue was discovered on D-Link DIR-850L 1.21WW devices

Q: How do I fix CVE-2018-18907?

dir-850l firmare: upgrade to 1.21b07. Exact commands for each OS are on this page.

Q: Is CVE-2018-18907 being exploited?

CVE-2018-18907 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-18907 affect?

CVE-2018-18907 affects dir-850l firmare. Severity is high (CVSS 7.5). An issue was discovered on D-Link DIR-850L 1.21WW devices. A partially completed WPA handshake is sufficient for obtaining full access to the wireless network. A client can access the network by sending packets on Data Frames to the AP with

Q: How urgent is CVE-2018-18907?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2018-18907 is a high-severity flaw (CVSS 7.5) affecting dir-850l firmare. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on D-Link DIR-850L 1.21WW devices. A partially completed WPA handshake is sufficient for obtaining full access to the wireless network. A client can access the network by sending packets on Data Frames to the AP without encryption.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-287
Published	2022-06-16
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

2022-06-16 22:15 UTCPublished CVE record published
2026-06-17 01:48 UTCUpdated Record last modified

dlink dir-850l firmare UPGRADE

Affected: < 1.21b07

Fixed in: 1.21b07

Safe to downgrade to: no unaffected older release

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-2018-18907?

dir-850l firmare: upgrade to 1.21b07. Exact commands for each OS are on this page.

Is CVE-2018-18907 being exploited?

CVE-2018-18907 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-2018-18907 affect?

CVE-2018-18907 affects dir-850l firmare. Severity is high (CVSS 7.5). An issue was discovered on D-Link DIR-850L 1.21WW devices. A partially completed WPA handshake is sufficient for obtaining full access to the wireless network. A client can access the network by sending packets on Data Frames to the AP with

How urgent is CVE-2018-18907?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2016-5681 CRITICAL 9.8 UPGRADE MITIGATE Stack-based buffer overflow in dws/api/Login on D-Link DIR-850L B1 2.07 before 2.07WWB05, DIR-817 Ax, DIR-818L

References

← Back to latest CVEs