Cisco patches RCE flaws across multiple products
CERT-FR advisory details multiple remote code execution vulnerabilities affecting Cisco Duo Access Gateway, Expressway, ISE, and wireless backhaul products.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 2 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-109618 and CVE-2026-109619 as exploited in the wild.
CERT-FR has published an advisory relaying a Cisco security bulletin (cisco-sa-php-october26-Jj384Daq, dated 30 October 2026) describing multiple vulnerabilities across several Cisco product lines that could allow an attacker to achieve remote arbitrary code execution. Affected systems include Duo Access Gateway (versions prior to 3.2.0), Expressway Select Series and Expressway Series (versions prior to 15.5.21), Identity Services Engine (ISE) Portal Builder (exploitable without user interaction), and Ultra-Reliable Wireless Backhaul (URWB) and Unified Industrial Wireless products (versions prior to 26.2.1.9, with fixes not expected until November 2026).
Two CVEs are referenced: CVE-2026-109618 and CVE-2026-109619, though the advisory does not provide technical details of the vulnerabilities themselves. No in-the-wild exploitation is mentioned in the advisory. Defenders should note that fixes for the wireless backhaul and industrial wireless products are not yet available and will not be released until November 2026, leaving an extended exposure window for those systems.
Organizations running affected Cisco products should consult the official Cisco security advisory for patch availability and apply updates where available (Duo Access Gateway, Expressway Series, ISE). For URWB and Unified Industrial Wireless products, defenders should monitor for the November 2026 patch release and consider compensating controls such as network segmentation in the interim.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1476
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