CVE-2026-62911
HighCVSS 8.0Exploitation Probability (EPSS)
Elevated risk69th percentile - higher than 69% of all known CVEs
Summary
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Risk Assessment
An attacker could use captured sessions to gain higher privileges, potentially leading to unauthorized access to sensitive data.
Recommendation
Update Microsoft Exchange Server and consider implementing mechanisms to prevent replay attacks.
Other vulnerabilities in Microsoft Exchange Server
See all- CVE-2026-87696High
Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-87695High
A vulnerability in Microsoft Exchange Server involves inclusion of functionality from an untrusted control sphere. An authorized attacker can elevate privileges locally.
- CVE-2026-87692High
A deserialization of untrusted data vulnerability in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
- CVE-2026-77910High
Incorrect authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-70571High
Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-70279Critical
Improper neutralization of input during web page generation (cross-site scripting) in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-69641Critical
Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
- CVE-2026-69356Critical
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-55008Critical
A cross-site scripting (XSS) vulnerability in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. The flaw is due to improper neutralization of input during web page generation.
- CVE-2026-45502Medium
A Server-Side Request Forgery (SSRF) vulnerability in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Original NVD description (English source)
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS