CVE-2026-85873: Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

PriorityP344medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.82%

56.9th percentile

Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
microsoft	skype_for_business_server_2015_cu13	>= 9319.0 < 6.0.9319.886	6.0.9319.886
microsoft	skype_for_business_server_2019_cu8	>= 2046.0 < 7.0.2046.583	7.0.2046.583
microsoft	skype_for_business_server_subscription_edition_cu1	>= 2046.0 < 7.0.2046.889	7.0.2046.889

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.