D-Link DIR-823X Command Injection Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-04-24
• EPSS: 88% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

A command injection vulnerability in D-Link DIR-823X 240126 and 240802 allows an authorized attacker to execute arbitrary commands on remote devices by sending a POST request to /goform/set_prohibiting via the corresponding function, triggering remote command execution.

CISA: D-Link DIR-823X contains a command injection vulnerability that allows an authorized attacker to execute arbitrary commands on remote devices by sending a POST request to /goform/set_prohibiting via the corresponding function. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 8 May 2026): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/mono7s/Dir-823x/blob/main/set_prohibiting/set_prohibiting.mdBroken LinkExploitThird Party Advisory
• www.akamai.com/blog/security-research/2026/apr/cve-2025-29635-mirai-campaign-targets-d-…ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource