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-2026-203030.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202700.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203120.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202670.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Moderate exploitation riskCVE-2026-202005.2% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 92% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202710.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202690.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-202880.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203130.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-203040.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• unknownMultiple vulnerabilities in Cisco IOS XE (August 25, 2026)cert-fr-avis
• unknownNCSC-2026-0279 [1.00] [M/H] Vulnerabilities patched in Cisco IOS XE Softwarencsc-nl
• high[NEW] [high] Cisco IOS: Vulnerability Enables Denial of Servicecert-bund
• high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund
• high[NEW] [high] Cisco Integrated Management Controller: 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

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 · 2026-09-03
• unknownMultiple vulnerabilities in Cisco products (September 3, 2026)cert-fr-avis · 2026-09-03
• highCVE-2026-20280: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd · 2026-09-02
• criticalCVE-2026-20279: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd · 2026-09-02
• highCVE-2026-20278: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd · 2026-09-02
• highCVE-2026-20277: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd · 2026-09-02

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