CVE-2026-9531
CVE-2026-9531 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Medium (CVSS 3.x base score 6.3)
- CVSS v2: 6.5
- CVSS v4: 2.1
- EPSS exploit prediction: 2% (76th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-31789
- Weakness: CWE-77
- Published:
- Last modified:
Description
A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
Frequently asked questions
- What is CVE-2026-9531?
- A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
- How severe is CVE-2026-9531?
- CVE-2026-9531 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-9531 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-9531?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-9531 have an EU (EUVD) identifier?
- Yes. CVE-2026-9531 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31789.
- When was CVE-2026-9531 published?
- CVE-2026-9531 was published on 2026-05-26 and last updated on 2026-06-17.
References
- https://github.com/wudipjq/my_vuln/blob/main/totolink4/vuln_54/54.md
- https://vuldb.com/submit/813929
- https://vuldb.com/vuln/365558
- https://vuldb.com/vuln/365558/cti
- https://www.totolink.net/
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