CVE-2026-77900

criticalpriority · track · 39OT risk · elevatedEPSS 0.007 · 54 %ileDERUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.72% (54th) EPSS
CVSS 9.8 · critical
Is it mine?
3 products
Check your exposure
Who says so?
3 sources
fstec_bdu · cert_bund · msrc_csaf

EPSS · scored 2026-10-27

Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.

01

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 3.9 · impact 5.9
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USCWE-306USCWE-306USCWE-306US
04

affected products (3)

Products and version ranges known to be affected.

05

advisories (2)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3834Microsoft Azure: Mehrere SchwachstellenDeutsch2026-10-08csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Azure Komponenten ausnutzen, um seine Privilegien zu erhöhen, beliebigen Code auszuführen, Spoofing-Angriffe durchzuführen oder Informationen offenzulegen.

  • msrc_CVE-2026-77900Azure App Service Remote Code Execution Vulnerability2026-10-08csaf · msrc_csafUS

    To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

06

also known as (1)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

fstec_bducert_bundmsrc_csafNVDCVE.orgMITRE
published 2026-10-08modified 2026-10-19
08

references (1) nvd

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan