Is CVE-2026-13536 in the CISA KEV catalog?

No. CVE-2026-13536 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-13536?

CVE-2026-13536 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-13536?

CVE-2026-13536 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-13536?

No published fix for CVE-2026-13536 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-13536

MEDIUM

4.3

CVSS v3

NVD

Description

A vulnerability has been found in GotoHTTP up to 10.2. This issue affects some unknown processing of the file /reg.12x. The manipulation of the argument sn leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor explains: "We immediately removed unnecessary parameter echo from source code. However the URL in the issue description will never be used in browser nor exposed to user, so it will not bring secure problem in fact. So we don't upgrade server right now, it will be included in next version together with other features."

CWE-79Cross-Site Scripting (XSS)CWE-94Code Injection

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-30.