CVE-2023-26848
RCE in Totolink A7100Ru Firmware 7.4cu.2313_b20191024
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-26848 is a critical-severity Command Injection (CWE-77) vulnerability in Totolink A7100Ru Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 21% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
TOTOlink A7100RU routers running firmware version V7.4cu.2313_B20191024 contain a command injection vulnerability, tracked as CVE-2023-26848 and assigned CWE-77. The flaw resides in the setting/delStaticDhcpRules endpoint and is triggered through the org parameter. It carries a CVSS 3.1 base score of 9.8, reflecting network-accessible exploitation without authentication or user interaction and full impact on confidentiality, integrity, and availability.
Remote attackers can send crafted HTTP requests to the affected endpoint to inject and execute arbitrary operating-system commands on the device. Successful exploitation grants an unauthenticated adversary complete control over the router, enabling actions such as configuration changes, traffic interception, or persistence mechanisms.
Public references consist of proof-of-concept material hosted on GitHub that demonstrates the injection vector; no vendor advisory or firmware patch information is included in the available references. The EPSS score reached a peak of 0.2173 and currently stands at 0.1490, indicating moderate and sustained exploitation interest following disclosure.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30640
Vulnerability Data
TOTOlink A7100RU(V7.4cu.2313_B20191024) was discovered to contain a command injection vulnerability via the org parameter at setting/delStaticDhcpRules.
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
A.8.25 mandates secure SDLC practices including secure coding guidelines, security requirements, checkpoints, testing (scans/penetration), and developer training that reduce command injection defects, but leaves a minority slice (e.g. incomplete implementation of those practices, outsourced development without full assurance, or post-SDLC changes) where the weakness can still arise and be exploitable.
Application security requirements explicitly call for controls against injection flaws including command injection.
A.8.27 mandates security-by-design principles (e.g. distrust external input, secure session control, data validation/sanitization, least privilege) and design reviews that can stop command injection from being introduced, but this is only a minority slice of CWE-77 because the weakness can still arise in code that bypasses those principles, in non-reviewed components, or in runtime injection vectors the architecture review does not reach.
Secure coding standards require proper escaping and parameterization of commands, directly eliminating CWE-77.
Security testing in development catches command-injection vulnerabilities before release.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-77, a class-level weakness, and none of its children carries one either.