CVE-2026-62911 Microsoft Exchange Server Elevation of Privilege Vulnerability
8.0
Analyse på rafaelpfister.ch
- Artikkel · 31. august 2026 CVE-2026-62911: Why 85 per cent of on-premises Exchange servers are vulnerable, and the technical reasons behind it The BSI reports that around 85 per cent of on-premises Exchange servers in Germany are vulnerable to CVE-2026-62911. This article explains the vulnerability technically: MRSProxy, missing channel binding, NTLM relay and Orange Tsai's Pwn2Own chain, as well as how to interpret the figures and what to do in practice.
- Artikkel · 19. august 2026 Exchange-sikkerhetsoppdateringer fra august 2026: Pwn2Own-sårbarhet lukket, OWA Light deaktivert August-SU-en lukker sju sårbarheter, inkludert Exchange-utnyttelsen som ble demonstrert på Pwn2Own 2026, og deaktiverer OWA Light permanent. Microsoft forklarer også hvorfor Exchange-SU-er nå kommer månedlig, og hvorfor Exchange SE CU1 fortsatt lar vente på seg.
Produsentens beskrivelse (engelsk)
Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. Referansedata
- Produsent
- Microsoft
- Berørte produkter
- Microsoft Exchange Server 2016 Cumulative Update 23
- Microsoft Exchange Server 2019 Cumulative Update 14
- Microsoft Exchange Server 2019 Cumulative Update 15
- Microsoft Exchange Server Subscription Edition RTM
- CVSS 3.1
- 8.0 (HIGH)
- Vektor
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C- Type svakhet
- CWE-294: Authentication Bypass by Capture-replay
- Publisert
- 11. august 2026
