CVE-2026-118208

HIGH

Published Nov 10, 2026 Modified Nov 12, 2026 CWE-15 CWE-284

Description

Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

Is your site exposed to CVE-2026-118208?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS — Exploit Prediction

0.0092

Probability of exploitation

0.61%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-15 CWE-15

CWE-284 CWE-284

References

Other References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118208

Frequently Asked Questions

What is CVE-2026-118208? +

Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-118208? +

CVE-2026-118208 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0092, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-118208? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-19592

OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata …

CVE-2024-11166

For TCAS II systems using transponders compliant with MOPS earlier than RTCA DO-181F, an attacker can impersonate a ground station …

CVE-2026-103442

External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection. This issue …

CVE-2026-46399

HAX CMS helps manage microsite universe with PHP or NodeJs backends. The PHP version of HAX CMS prior to version …

CVE-2026-107503

Unvalidated environments URL allows OAuth authorization code + PKCE verifier theft and account takeover via injected OIDC authority in Ditto …

CVE-2025-0425

Via the GUI of the "bestinformed Infoclient", a low-privileged user is by default able to change the server address of …