## Summary
CVE-2026-62878 is a critical stack-based buffer overflow in Windows DNS that can allow an unauthorized remote attacker to execute code over the network. The issue is classified as CWE-121 and has a CVSS score of 9.8 with AV:N/AC:L/PR:N/UI:N.
## Technical Details
- Vulnerability type: stack-based buffer overflow (CWE-121).
- Affected component: Windows DNS.
- Attack vector: network (AV:N).
- Privileges required: none (PR:N).
- User interaction required: none (UI:N).
- Impact scope: confidentiality, integrity, and availability are all high (C:H/I:H/A:H).
## Affected
- Windows DNS (exact product names/versions not provided in the available content).
## Impact
- Remote code execution over the network is possible for an unauthorized attacker.
- Potential outcomes include full compromise of confidentiality and integrity, and disruption of availability.
## Mitigation
1. Patch/upgrade Windows DNS using the vendor’s latest security update for CVE-2026-62878 (no fixed version details were available from the provided material).
2. If patching is not immediately possible, restrict network access to DNS services (reduce exposure consistent with AV:N and PR:N).
3. Apply compensating controls such as network segmentation and firewall rules to limit who can reach the DNS endpoint(s).
4. Monitor for anomalous DNS traffic patterns and unexpected service behavior (specific detection indicators were not available from the provided material).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-121