CVE-2026-5850
CVE-2026-5850 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 16% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- CVSS v4: 8.9
- EPSS exploit prediction: 16% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-20862
- Weakness: CWE-77
- Published:
- Last modified:
Description
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument pptpPassThru leads to os command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
Frequently asked questions
- What is CVE-2026-5850?
- A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument pptpPassThru leads to os command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
- How severe is CVE-2026-5850?
- CVE-2026-5850 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-5850 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-5850?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-5850 have an EU (EUVD) identifier?
- Yes. CVE-2026-5850 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20862.
- When was CVE-2026-5850 published?
- CVE-2026-5850 was published on 2026-04-09 and last updated on 2026-06-17.
References
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_156/README.md
- https://vuldb.com/submit/791266
- https://vuldb.com/vuln/356376
- https://vuldb.com/vuln/356376/cti
- https://www.totolink.net/
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