Action1 RCE Vulnerability in Microsoft Excel Requires Immediate Attention
Article Content
- •CVE-2026-97739 is a critical RCE vulnerability in Microsoft Excel requiring user interaction.
- •The vulnerability has a CVSS score of 8.8 and was published on October 13, 2026.
- •No active exploitation has been confirmed, but organizations should patch immediately.
Microsoft has disclosed a Remote Code Execution (RCE) vulnerability in Microsoft Office Excel, tracked as CVE-2026-97739, which could allow unauthorized code execution on affected systems. The vulnerability arises from an integer underflow leading to a heap-based buffer overflow, requiring user interaction to exploit. Users are at risk if they open specially crafted Office files, potentially compromising sensitive data and disrupting operations. Although currently considered less likely to be exploited, the vulnerability has a CVSS score of 8.8, indicating a high severity. Microsoft has not confirmed any active exploitation or publicly available proof-of-concept code. The vulnerability was published on October 13, 2026, alongside another related vulnerability, CVE-2026-100210, which shares similar characteristics. Organizations using Microsoft Office Excel are urged to apply patches promptly to mitigate risks.
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