Security readout for executives and security teams
Plain-English summary
CVE-2022-26258 is a critical remote command execution flaw reported in D-Link DIR-820L firmware 1.05B03. An attacker who can reach the router’s web interface may be able to run system commands without authentication. CISA lists it in the Known Exploited Vulnerabilities catalog, so treat exposed devices as urgent.
Executive priority
Prioritize within emergency vulnerability management processes for any exposed device. Because this is critical, unauthenticated, and KEV-listed, the business risk is router takeover and network compromise. If the device is unsupported or unpatchable, replacement is the safest path.
Technical view
The CVE describes CWE-78 command injection in D-Link DIR-820L 1.05B03 via an HTTP POST request to the get/set ccp functionality. CVSS 3.1 is 9.8: network-accessible, low complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Highest risk is DIR-820L 1.05B03 devices with reachable administrative HTTP services, especially internet-exposed routers. Internal-only exposure still matters because compromise can provide a foothold for traffic interception, lateral movement, or denial of service.
Exploitation context
Active exploitation is supported by CISA KEV listing. Public GitHub references discuss the vulnerability, increasing defender awareness and attacker discoverability. The provided sources do not include safe details on exploit prevalence, campaigns, or attacker tooling.
Researcher notes
Source evidence names DIR-820L 1.05B03 and a POST-based command execution issue. The CVE affected-product metadata is sparse, and vendor-specific fix details are not provided in the bundle. Avoid assuming other firmware versions or models are affected without vendor confirmation.
Mitigation direction
- Identify any D-Link DIR-820L devices and firmware versions in use.
- Check D-Link’s security bulletin and support guidance for fixed firmware or lifecycle status.
- Remove administrative interfaces from internet exposure immediately.
- Restrict router management access to trusted networks only.
- Replace or retire affected devices if no supported fix is available.
- Monitor for unexpected router configuration changes or outbound traffic.
Validation and detection
- Inventory edge devices and confirm model and firmware version.
- Check whether management HTTP services are reachable from untrusted networks.
- Review CISA KEV status for organizational remediation deadlines.
- Verify D-Link guidance before declaring remediation complete.
- After changes, confirm remote administration is not externally accessible.
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-78: 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-2022-26258 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
SSVC decision data
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:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2022-26258 added to CISA KEV
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2022-09-08T00:00:00.000Z: CVE-2022-26258 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dlink.com/en/security-bulletin/CVE reference, mitre
- https://github.com/skyedai910/Vuln/tree/master/DIR-820L/command_execution_0CVE reference, mitre
- https://github.com/zhizhuoshuma/cve_info_data/blob/ccaed4b94ba762eb8a8e003bfa762a7754b8182e/Vuln/Vuln/DIR-820L/command_execution_0/README.mdCVE reference, mitre
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26258CVE reference, CISA-ADP · 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.