Exploited CVEs / Cisco / CVE-2019-1653

CVE-2019-1653

Cisco Small Business RV320 and RV325 Routers Information Disclosure Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-05-03 (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.

Risk summary

HighCISA KEV

7.5

CVSS v3 base

100%

EPSS exploit probability

High

Severity

2021-11-03

Added to KEV

2022-05-03 (past due)

CISA due date

Actively exploited Cisco Small Business RV320 and RV325 Routers vulnerability, High severity, CVSS v3 7.5. Added to the CISA KEV catalog 2021-11-03.

Senserva AI read on CVE-2019-1653 CISA required action Official fix for CVE-2019-1653 Admin questions

Senserva AI Opinion for CVE-2019-1653

With no authentication at all, an attacker can pull the full device configuration, including credentials, from Cisco RV320 and RV325 VPN routers over the web interface, and EPSS scores it at the maximum 100%. Harvested configs feed directly into CVE-2019-1652 for authenticated command execution, a chain that was mass-exploited within days of disclosure. Small business VPN edges running this High Severity pair should be presumed harvested.

Do this: Update RV320 and RV325 firmware, change every credential that ever lived in the router config, and disable remote web management.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2019-1653

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2019-1653, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2019-1653.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed once a day (early morning US Central)):
- CVE-2019-1653: Cisco Small Business RV320 and RV325 Routers Information Disclosure Vulnerability
- Affected: Cisco Small Business RV320 and RV325 Routers
- Severity: High, CVSS v3 7.5; EPSS 30-day exploitation probability 100%
- Added to CISA KEV: 2021-11-03; federal remediation due 2022-05-03
- Ransomware-linked: no
- CISA required action: Apply updates per vendor instructions.
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch now

Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.

The fix ships from the vendor: Cisco Security Advisories (PSIRT).

Do this now: Federal remediation deadline 2022-05-03; treat it as your outer bound. Patch now and verify deployment on every exposed device.

Updated September 3, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Full tracking and change history for CVE-2019-1653

Published: 2021-11-03
Last revised: 2021-11-03
Changes tracked: 1

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.

Senserva Watchevery change we have recorded for this one

What changed, and when

2021-11-03 added to the CISA KEV catalog by CISA
2026-07-17 CVSS 0.0 to 7.5; EPSS first scored at 99.9%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal (BOD 22-01) remediation due date: 2022-05-03 (past due).

Apply updates per vendor instructions.

Official fix for CVE-2019-1653

The authoritative fix and affected-version list are published by the vendor. Find the Small Business RV320 and RV325 Routers advisory on Cisco Security Advisories (PSIRT).

Cisco Security Advisories (PSIRT)CISA KEV entry

Common questions about CVE-2019-1653

Is CVE-2019-1653 actively exploited?

Yes. CVE-2019-1653 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%.

What is the CISA deadline and required action for CVE-2019-1653?

CISA set the federal (BOD 22-01) remediation due date at 2022-05-03, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.

What fixes CVE-2019-1653?

The authoritative fix is in the vendor advisory: see Cisco Security Advisories (PSIRT) for the patched Small Business RV320 and RV325 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-2019-1653?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2019-1653'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 once a day (early morning US Central).

Scope and sources

More exploited Cisco CVEs: CVE-2026-20349 CVE-2026-20316 CVE-2008-4128 CVE-2026-20230 CVE-2026-20262 CVE-2026-20245 CVE-2026-20182 CVE-2026-20133
All Cisco exploited CVEs on one page: Cisco vulnerabilities actively exploited.
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.