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PatchSiren cyber security CVE debrief

CVE-2022-26258 D-Link CVE debrief

CVE-2022-26258 is a remote code execution vulnerability affecting the D-Link DIR-820L. CISA has added it to the Known Exploited Vulnerabilities catalog, and the KEV entry says the impacted product is end-of-life and should be disconnected if still in use.

Vendor
D-Link
Product
DIR-820L
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2022-09-08
Original CVE updated
2022-09-08
Advisory published
2022-09-08
Advisory updated
2022-09-08

Who should care

Organizations that still operate or manage D-Link DIR-820L devices should treat this as an urgent remediation item, especially if the device is externally reachable or difficult to inventory.

Technical summary

The supplied public record identifies the issue as a remote code execution vulnerability in the D-Link DIR-820L. The CISA KEV catalog entry indicates known exploitation and directs defenders to disconnect the end-of-life product if it is still deployed.

Defensive priority

High. A KEV-listed vulnerability on an end-of-life device deserves immediate attention because mitigation options are limited and CISA’s required action is to remove it from active use.

Recommended defensive actions

  • Inventory environments for any D-Link DIR-820L devices and confirm whether they are still in use.
  • Disconnect or isolate any DIR-820L device that remains deployed, per CISA KEV guidance.
  • Plan replacement with supported hardware since the product is end-of-life.
  • Review perimeter exposure and ensure the device is not unnecessarily reachable from the internet.
  • Track remediation against the CISA KEV due date of 2022-09-29.

Evidence notes

The supplied corpus contains a CVE record, an NVD link, and a CISA KEV entry dated 2022-09-08. The KEV metadata explicitly states that the product is end-of-life and should be disconnected if still in use, but the corpus does not provide exploit details, CVSS scoring, or a full attack chain.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-26258 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-26258

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2022-26258 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-26258

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.