CVE-2026-21527

🔶 medium

Summary

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

CVSS Score

6.5

Medium

EPSS Score

9.5

Exploit Probability

Published Date

2026-02-10

First Seen: 2026-02-11

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 47.8% of all 328,009 vulnerabilities in our database.

#171,192

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Feb 11, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-06-15

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-345 CWE-451 CWE-1286

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
microsoft	exchange_server	Affected	< 15.02.2562.037
microsoft	exchange_server	Affected	v2016
microsoft	exchange_server	Affected	v2019

🔗 References 1

https://msrc.microsoft.com/update-guide/vulnerabilit...

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-45501	🔶 medium	6.5	0.3	Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows...	2026-06-09
CVE-2026-45502	🔶 medium	5.0	0.4	Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information ov...	2026-06-09
CVE-2026-45503	⚠️ high	8.1	0.4	Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information ov...	2026-06-09
CVE-2026-45504	⚠️ high	8.8	0.4	Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over...	2026-06-09
CVE-2026-47631	⚠️ high	8.1	0.2	Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows...	2026-06-09
CVE-2026-42897	⚠️ high	8.1	2.5	Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows...	2026-05-14

These CVEs affect the same products