CVE-2026-62871
CVE-2026-62871 is a high-severity vulnerability in Microsoft .net with a CVSS 3.x base score of 7.8. 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-122.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (33rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-122
- Affected product: Microsoft .net
- Published:
- Last modified:
Description
Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
Frequently asked questions
- What is CVE-2026-62871?
- Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
- How severe is CVE-2026-62871?
- CVE-2026-62871 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-62871 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-62871?
- CVE-2026-62871 primarily affects Microsoft .net. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-62871?
- 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.
- When was CVE-2026-62871 published?
- CVE-2026-62871 was published on 2026-08-11 and last updated on 2026-08-13.
References
Affected products (3)
- cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
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