Multiple vulnerabilities in Cisco IOS XE (August 25, 2026)
Multiple vulnerabilities have been discovered in Cisco IOS XE. They allow an attacker to cause a security policy bypass and an unspecified security issue by the publisher.
CSIRTS triage
- What
- Multiple vulnerabilities allow security policy bypass and unspecified security issues.
- Who is affected
- Deployments of Cisco IOS XE.
- Urgency
- Unknown severity with multiple CVEs; details are limited but policy bypass is concerning.
- Action
- Monitor Cisco security advisories for patches and mitigation guidance for the seven disclosed CVEs.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1077/
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-2026-202700.28% 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-2026-202670.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
- 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-2026-202730.28% 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-2026-202720.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-202680.28% 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
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-20270 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20267 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20271 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20269 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20273 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20272 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-20268 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownNCSC-2026-0279 [1.00] [M/H] Vulnerabilities patched in Cisco IOS XE Softwarencsc-nl
- high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund
- unknownCisco Products Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Cisco products (August 6, 2026)cert-fr-avis
- highCVE-2026-20273: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- criticalCVE-2026-20272: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- highCVE-2026-20271: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- highCVE-2026-20270: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- highCVE-2026-20269: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- highCVE-2026-20268: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- criticalCVE-2026-20267: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd
- criticalCisco Advance Notification for Publication of August 5, 2026, Security Advisoriescisco-psirt
Recent advisories for Cisco IOS XE
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.
- unknownNCSC-2026-0279 [1.00] [M/H] Vulnerabilities patched in Cisco IOS XE Softwarencsc-nl · 2026-08-07
- high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund · 2026-08-06
- mediumCVE-2026-20311: A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an …nvd · 2026-08-05
- mediumCVE-2026-20308: A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an …nvd · 2026-08-05
- highCVE-2026-20301: A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the Ex…nvd · 2026-08-05
- highCVE-2026-20273: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS…nvd · 2026-08-05
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