CVE-2011-4723

The D-Link DIR-300 router stores cleartext passwords, which allows context-dependent attackers to obtain sensitive information via unspecified vectors.

CVSS: 5.7Mediumscored by CISA
Exploited in the wild: Yes, in CISA KEV since 8 Sept 2022CISA deadline for US federal agencies: 29 Sept 2022
EPSS: 3.1%chance of exploitation in the next 30 daystop 13% of scored CVEsFIRST score of 11 Nov 2026
Fix: Not stated by the vendorno fixed release in the CVE record
Published: 20 Dec 2011analysed here 12 Nov 2026

Do first. The impacted product is end-of-life and should be disconnected if still in use. (CISA's required action for this KEV entry)

Summary

Triage

Exploitable: At runtime
Attack vector: adjacent network
Weakness: CWE-312 Common Weakness
Can a WAF block it?: No. See why

The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.

Affected products

Products named in our analysis

dlink:dir-300_firmware

Fix and mitigation

WAF and other mitigations

Can a WAF block it? No. The attack does not come over the network, so a WAF is not on its path. Patching is the reliable fix.

Also consider: patch

Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

Remediation steps (AI-written)

Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.

Exploitation evidence

CISA KEV catalog: Listed since 8 Sept 2022.
CISA due date: 29 Sept 2022, the remediation deadline for US federal agencies
CISA required action: The impacted product is end-of-life and should be disconnected if still in use.
Public exploit code: None on record in Exploit-DB, Metasploit, Nuclei templates or PoC-in-GitHub.
CISA SSVC: exploitation active, automatable no, technical impact partialAssessed by CISA 10 Feb 2025 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.

Timeline

20 Dec 2011Published
8 Sept 2022Added to CISA KEV (exploited in the wild)3,915 days (about 11 years) later
29 Sept 2022CISA remediation due date (US federal agencies)21 days later
10 Feb 2025CISA SSVC assessment: exploitation active866 days (about 2 years) later
22 Oct 2025CVE record last updated253 days (about 8 months) later
12 Nov 2026Analysed by vulneraibility.com387 days (about 1 year) later

CVSS vector

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

Metric	Value	What it means
Attack vector	AdjacentSame subnet or link layer.	Same subnet or link layer.
Attack complexity	LowRepeatable attack, no special conditions.	Repeatable attack, no special conditions.
Privileges required	LowThe attacker needs basic user privileges.	The attacker needs basic user privileges.
User interaction	NoneNo victim action needed.	No victim action needed.
Scope	UnchangedImpact stays within the vulnerable component.	Impact stays within the vulnerable component.
Confidentiality	HighTotal data disclosure possible.	Total data disclosure possible.
Integrity	NoneNo unauthorised modification.	No unauthorised modification.
Availability	NoneThe service stays up.	The service stays up.

Common questions

Is CVE-2011-4723 being exploited?

Yes. CVE-2011-4723 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2011-4723?

CVE-2011-4723 is rated Medium with a CVSS score of 5.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2011-4723?

Not known from our data. No patch reference has been recorded for CVE-2011-4723, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.

What does CVE-2011-4723 affect?

CVE-2011-4723 affects dlink:dir-300_firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

References

NVD CVE.org CVE Details Source

2 references in the CVE record, grouped by the tags the record gives them.

Where the data on this page comes from

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA KEV catalog: exploitation, date added, due date
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile

Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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