CVE-2026-15270 dir-823g firmware vulnerability
A weakness has been identified in D-link DIR-823G 1.0.2B05_20181207. Affected by this vulnerability is an unknown functionality of the file /etc/boa/boa.conf of the component Web Interface. Executing a manipulation can lead to least privilege violation. The attack can be launched remotely. The attack requires a high level of complexity. The exploitation appears to be difficult. The exploit has been made available to the public and could be used for attacks.
Quick answer
dlink dir-823g firmware should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- 1.0.2b05_20181207
- -
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
D-Link DIR-823G firmware is affected by CVE-2026-15270, a security exposure. A weakness has been identified in D-link DIR-823G 1.0.2B05_20181207. The recommended remediation is to update to a vendor-supported firmware build if available; otherwise replace or isolate affected D-Link DIR-823G firmware 1.0.2B05_20181207. Until the update is complete, remove internet exposure of the router web interface and restrict management to trusted networks, review logs, and reduce exposure of the affected service or workflow.
- Inventory every deployment, package, appliance, container, service, and managed environment that uses D-Link DIR-823G firmware.
- Confirm the installed version and compare it with listed affected versions include 1.0.2b05_20181207, - and the source advisory for CVE-2026-15270.
- Apply the vendor-supported fix: update to a vendor-supported firmware build if available; otherwise replace or isolate affected D-Link DIR-823G firmware 1.0.2B05_20181207.
- If the update cannot be applied immediately, remove internet exposure of the router web interface and restrict management to trusted networks; disable unnecessary public access, endpoints, plugins, integrations, or management interfaces until patched.
- Review application, device, reverse-proxy, WAF, package manager, container, authentication, and audit logs for activity related to CVE-2026-15270.
- Rotate sessions, API tokens, service credentials, integration keys, and administrator passwords if logs or affected data indicate compromise or unauthorized access.
- Clear caches, restart affected services, rebuild affected containers or appliances when appropriate, and remove temporary files or stored payloads created during exploitation attempts.
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Verify the fix
- Confirm D-Link DIR-823G firmware now reports a vendor-supported firmware build if available; otherwise replace or isolate affected D-Link DIR-823G firmware 1.0.2B05_20181207 or a later vendor-supported fixed release for the deployed branch.
- Verify the affected workflow no longer allows the behavior described in CVE-2026-15270, using a safe regression test or vendor-provided validation method.
- Review logs after remediation for continued exploit attempts, denial-of-service symptoms, suspicious redirects, unauthorized requests, file access, or configuration changes.
- Rerun a Fixnx scan and any product-specific scanner, package audit, device health check, or manual regression test relevant to the affected service.
- Document affected assets, fixed versions, mitigation decisions, validation evidence, and any cleanup or credential rotation performed.
Trusted references
FAQ
What is affected by CVE-2026-15270?
dlink dir-823g firmware versions listed as affected should be reviewed: 1.0.2b05_20181207, -.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.