Exploited CVEs / Cisco / CVE-2019-15271
CVE-2019-15271
Cisco RV Series Routers Deserialization of Untrusted Data Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-06-22 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Cisco Security Advisories (PSIRT), linked below.
Actively exploited Cisco RV Series Routers vulnerability, High severity, CVSS 8.8. Added to the CISA KEV catalog 2022-06-08.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2019-15271
Cisco Small Business RV Series routers deserialize untrusted data in their web management interface, letting an attacker execute code as root on the device that terminates the office VPN and internet edge. It is rated High Severity at CVSS 8.8 and is on the CISA KEV list, and many affected RV models have since reached end of life with no further fixes coming. Branch offices and small sites that installed these routers years ago are the exposed population.
Do this: Identify RV Series routers in your estate, disable WAN-side management access immediately, and plan replacement of end-of-life units.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2019-15271
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2019-15271
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-06-22 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2019-15271
The authoritative fix and affected-version list are published by the vendor. Find the RV Series Routers advisory on Cisco Security Advisories (PSIRT).
Common questions about CVE-2019-15271
Is CVE-2019-15271 actively exploited?
Yes. CVE-2019-15271 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-06-08, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 6.0%.
What is the CISA deadline and required action for CVE-2019-15271?
CISA set the federal (BOD 22-01) remediation due date at 2022-06-22, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2019-15271?
The authoritative fix is in the vendor advisory: see Cisco Security Advisories (PSIRT) for the patched RV Series Routers versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2019-15271?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2019-15271's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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