CVE-2026-50656: microsoft malware_protection_engine Link Following
CVSS: 7.8v3.1HighModified
Published 16-06-2026Last modified 24-09-2026
Vulnerability summary
CVE-2026-50656 is a high (CVSS 7.8) Link Following vulnerability in microsoft malware_protection_engine. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.37%
0%100%
Low · -10.99 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 16-06-2026PublishedVulnerability first disclosed.
- 24-09-2026Last modifiedVulnerability information updated.
Description
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:CSources2 sources · 7.0–7.8
- NVDNIST7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.37%
Chance of exploitation in the next 30 days
Percentile
29%
Versus all other CVEs
30-day change
-10.99 pp
From 11.36% on 19-09-2026
19-09-202619-10-2026
EPSS score0.37%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundShieldbreak
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Microsoft2 products
- malware_protection_enginena
- microsoft malware protection engine≥ 1.1.0.0, < 1.1.26060.3008
1 vendor · 2 products
