CVE-2026-76504: Cisco security advisory (AV26-978)

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CVE-2026-76504

KEV ✓ EPSS 0.39 EPSS k 14. 11. 2026 náprava do 3. 10. 2026

Hodnocení závažnosti

9.8 CVSS 3.1 cisco

útok odkudkoli z internetu bez přípravy bez přihlášení bez zásahu uživatele
dopad plný únik dat úplná změna dat úplný výpadek
přesah dopad jen na zranitelnou součást

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

zvyšuje závažnost mírně zvyšuje závažnost snižuje závažnost

Hvězdička u CVE znamená, že jsem to číslo vytáhl z širšího textu článku. Neukazuju u něj proto KEV, EPSS ani CVSS, a to preventivně, protože článek se na něj mohl jen odkazovat, třeba jako na starší kauzu. Fakta o samotném CVE jsou nahoře.

InfraTrust report warns of exploited flaws in critical network infrastructure

Attackers are actively exploiting vulnerabilities across critical network infrastructure, and PHP flaws known as "PHP2Shell" put the web management interfaces of firewalls, VPNs, application delivery controllers, and other appliances at risk. [...]

CVE-2026-0322 * CVE-2026-104286 * CVE-2026-104935 * CVE-2026-109618 * CVE-2026-109619 * CVE-2026-114625 * CVE-2026-31431 * CVE-2026-76504 * CVE-2026-76519 * CVE-2026-88771 * CVE-2026-88772 * CVE-2026-88779 * CVE-2026-93616 * CVE-2026-93952 * CVE-2026-94127 * US

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· BleepingComputer · InfraTrust report warns of exploited flaws in critical network infrastructure

5th October – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 5th October, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Arizona’s state court system has suffered a phishing-led cyberattack after an employee clicked a malicious link. Attackers copied backup files containing protective-order records and more than 150,000 Foster Care Review Board reports dating back to 2010, exposing personal and case-related information belonging to current and former participants.…

KEV ✓ EPSS 0.82 CVSS 9.9 CVE-2026-76504 CVE-2026-86950 CVE-2026-88771 CVE-2026-88772 CVE-2026-90970 Citrix Cisco Apple GitLab IL

tg: přehled tp: malware tp: ransomware tp: únik dat

· Check Point Research · 5th October – Threat Intelligence Report

SPOJENO PŘES CVE Cisco security advisory (AV26-978)

Serial Number: AV26-978 Date: October 1, 2026 As of September 30, 2026, Cisco is affected by a vulnerability in the following product: Cisco Catalyst SD-WAN Manager Versions prior to 20.9.10.1, 20.12.8.2, 20.15.6.1, 20.18.4.1, 26.1.2.1 et 26.2.1 On September 30, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-76504 to their Known Exploited Vulnerabilities (KEV) Database. The Cyber Centre encourages users and administrators to review the provided web links and apply…

KEV ✓ EPSS 0.39 CVSS 9.8 CVE-2026-76504 Cisco CA HU FI FR US IT

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· Cyber Centre Kanada · Cisco security advisory (AV26-978) · NKI Maďarsko · Riasztás a Cisco Catalyst SD-WAN Manager rendszert érintő sérülékenységről · zachyceno · NCSC-FI · Cisco Catalyst SD-WAN Manager API Authentication Bypass Vulnerability · zachyceno · CERT-FR – avis · Vulnérabilité dans Cisco Catalyst SD-WAN (01 octobre 2026) · BleepingComputer · Cisco warns of new SD-WAN zero-day exploited in attacks · CSIRT Itálie (ACN) · Cisco: rilevato sfruttamento in rete di una vulnerabilità in Catalyst SD-WAN Manager · Cisco PSIRT · Cisco Catalyst SD-WAN Manager API Authentication Bypass Vulnerability · zachyceno · CISA KEV · Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability (CVE-2026-76504)

Critical Cisco Catalyst SD-WAN Manager API authentication bypass exploited in the wild (CVE-2026-76504)

OverviewOn September 30, 2026, Cisco published a security advisory for CVE-2026-76504, a critical API authentication bypass vulnerability affecting Cisco Catalyst SD-WAN Manager. The vulnerability has a CVSSv3.1 score of 9.8 and results from improper handling of URL encoding (CWE-177). An unauthenticated, remote attacker can send a crafted HTTP request that bypasses an authentication rule for a specific API endpoint, gaining access to the API with the privileges of the admin user.According to…

KEV ✓ EPSS 0.91 CVSS 9.8 CVE-2026-20127 CVE-2026-20182 CVE-2026-76504 Cisco US

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· Rapid7 · Critical Cisco Catalyst SD-WAN Manager API authentication bypass exploited in the wild (CVE-2026-76504)