CVE-2026-80077: CWE-122: Heap-based Buffer Overflow in Microsoft Remote Desktop client for Windows Desktop
Description
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Remote Desktop client for Windows Desktop
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-80077 is a heap-based buffer overflow vulnerability (CWE-122) in the Microsoft Remote Desktop client for Windows Desktop. It allows an attacker to execute arbitrary code remotely by sending crafted data over the network. The vulnerability affects versions >=1.2.0.0 and <1.2.7279.0. The CVSS v3.1 base score is 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code remotely on the affected system, potentially leading to full system compromise. The impact includes high confidentiality, integrity, and availability loss. However, exploitation requires user interaction.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for the Remote Desktop client to remediate this vulnerability. No additional mitigation steps are specified or required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-25T18:37:59.828Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80077","vendor":"Microsoft"}]
Threat ID: 6aa04566acd9273b49faa2d9
Added to database: 09/08/2026, 17:27:02 UTC
Last enriched: 10/14/2026, 22:04:10 UTC
Last updated: 10/23/2026, 15:10:15 UTC
Views: 30
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.