CVE-2025-64677
CVE-2025-64677 is a high-severity vulnerability in Microsoft Office Out-of-box Experience with a CVSS 3.x base score of 8.2. 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-79.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-204412
- Weakness: CWE-79
- Affected product: Microsoft Office Out-of-box Experience
- Published:
- Last modified:
Description
Improper neutralization of input during web page generation ('cross-site scripting') in Office Out-of-Box Experience allows an unauthorized attacker to perform spoofing over a network.
Frequently asked questions
- What is CVE-2025-64677?
- Improper neutralization of input during web page generation ('cross-site scripting') in Office Out-of-Box Experience allows an unauthorized attacker to perform spoofing over a network.
- How severe is CVE-2025-64677?
- CVE-2025-64677 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2025-64677 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-64677?
- CVE-2025-64677 affects Microsoft Office Out-of-box Experience. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-64677?
- 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-2025-64677 have an EU (EUVD) identifier?
- Yes. CVE-2025-64677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204412.
- When was CVE-2025-64677 published?
- CVE-2025-64677 was published on 2025-12-18 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:microsoft:office_out-of-box_experience:-:*:*:*:*:*:*:*
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