Multiple vulnerabilities in Cisco products (August 6, 2026)

CSIRTS triage

What

Multiple Cisco product vulnerabilities enabling remote arbitrary code execution, denial of service, and confidentiality breach.

Who is affected

Unspecified Cisco product installations.

Urgency

High urgency due to RCE and data confidentiality impact; immediate patching required.

Action

Consult Cisco advisories for August 6, 2026 and apply patches for affected products.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-FR Avis de sécurité (FR · national-cert · site)

Severity

unknown

Published

2026-08-06

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0975/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-203030.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202700.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203120.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202670.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202000.84% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202710.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202690.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202880.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203130.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203040.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[NEW] [high] Cisco IOS: Vulnerability Enables Denial of Servicecert-bund
• high[NEW] [high] Cisco Integrated Management Controller: Multiple Vulnerabilitiescert-bund
• high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund
• high[NEW] [high] Cisco Catalyst SD-WAN Manager: Multiple Vulnerabilitiescert-bund
• unknownNCSC-2026-0277 [1.00] [M/H] Vulnerabilities patched in Cisco Catalyst SD-WANncsc-nl
• unknownCisco Products Multiple Vulnerabilitieshkcert
• highCVE-2026-20313: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd
• highCVE-2026-20312: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd
• criticalCVE-2026-20310: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd
• criticalCVE-2026-20304: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd
• criticalCVE-2026-20303: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd
• highCVE-2026-20301: A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the Ex…nvd

Recent advisories for Cisco products

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• unknownCisco Products Multiple Vulnerabilitieshkcert · 2026-08-06
• highCVE-2026-20313: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd · 2026-08-05
• highCVE-2026-20312: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd · 2026-08-05
• criticalCVE-2026-20310: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd · 2026-08-05
• criticalCVE-2026-20304: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd · 2026-08-05
• criticalCVE-2026-20303: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Cat…nvd · 2026-08-05

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