How severe is CVE-2026-36799?

CVE-2026-36799 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-36799 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-36799?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-36799 have an EU (EUVD) identifier?

Yes. CVE-2026-36799 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35947.

When was CVE-2026-36799 published?

CVE-2026-36799 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-36799

CVE-2026-36799 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35947
Weakness: CWE-120
Published: 2026-06-09
Last modified: 2026-06-17

Description

Shenzhen Tenda Technology Co., Ltd Tenda G0 v15.11.0.5 was discovered to contain a buffer overflow in the portalAuth parameter of the formPortalAuth function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Frequently asked questions

What is CVE-2026-36799?: Shenzhen Tenda Technology Co., Ltd Tenda G0 v15.11.0.5 was discovered to contain a buffer overflow in the portalAuth parameter of the formPortalAuth function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
How severe is CVE-2026-36799?: CVE-2026-36799 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-36799 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-36799?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-36799 have an EU (EUVD) identifier?: Yes. CVE-2026-36799 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35947.
When was CVE-2026-36799 published?: CVE-2026-36799 was published on 2026-06-09 and last updated on 2026-06-17.

References

https://github.com/xhh0124/SemVulLLM/tree/main/G0/formPortalAuth

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