Security readout for executives and security teams
Plain-English summary
CVE-2025-29635 lets an authenticated attacker run operating-system commands on affected D-Link DIR-823X devices. That can mean full device compromise, traffic abuse, or botnet enrollment. CISA KEV and Akamai reporting support real-world exploitation, so exposed devices should be treated as urgent.
Executive priority
Treat this as urgent for any internet-exposed or remotely managed DIR-823X device. KEV status means exploitation is known, and compromised routers can support botnets, persistence, traffic interception, or internal pivoting.
Technical view
The CVE describes CWE-77 command injection in D-Link DIR-823X builds 240126 and 240802. A remote authorized attacker can trigger command execution through the /goform/set_prohibiting request path. CVSS 3.1 is 7.2, with network access, low complexity, high privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is most likely where D-Link DIR-823X devices running builds 240126 or 240802 are reachable over networks an attacker can access. Structured affected-product CPE data is missing, so inventory confirmation is required.
Exploitation context
Active exploitation is supported by CISA KEV listing and Akamai reporting of a Mirai campaign targeting D-Link devices. The sources do not prove every exposed DIR-823X is vulnerable, nor do they provide a vendor-fixed version in the bundle.
Researcher notes
The bundle names the vulnerable endpoint and affected builds but lacks authoritative vendor remediation, CPEs, and lifecycle status. Avoid assuming patch availability. Validate exposure through asset inventory and defensive telemetry rather than reproducing exploitation.
Mitigation direction
- Identify and prioritize all D-Link DIR-823X devices running builds 240126 or 240802.
- Check D-Link/vendor guidance for fixed firmware or replacement recommendations.
- Remove management interfaces from internet exposure and untrusted networks.
- Restrict administration to trusted networks or VPN access only.
- Rotate administrative credentials and remove unnecessary privileged accounts.
- Monitor affected networks for botnet-like scanning or unexpected outbound connections.
Validation and detection
- Inventory device model, firmware build, and management exposure for each DIR-823X.
- Confirm whether any device runs build 240126 or 240802.
- Check CISA KEV and vendor advisories for remediation status.
- Review logs for unusual privileged configuration changes or requests to /goform/set_prohibiting.
- Look for post-compromise indicators such as unexpected processes, DNS, or outbound scanning.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-29635 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/mono7s/Dir-823x/blob/main/set_prohibiting/set_prohibiting.mdCVE reference
- https://www.akamai.com/blog/security-research/2026/apr/cve-2025-29635-mirai-campaign-targets-d-link-devicesCVE reference · third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-29635CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.