CVE-2019-15271

Summary

A lack of input validation of the HTTP payload in the web-based management interface of certain Cisco Small Business RV Series Routers allows an authenticated, remote attacker with a valid credential or an active session token to execute arbitrary commands with root privileges.

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Description

A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker to execute arbitrary commands with root privileges. The attacker must have either a valid credential or an active session token. The vulnerability is due to lack of input validation of the HTTP payload. An attacker could exploit this vulnerability by sending a malicious HTTP request to the web-based management interface of the targeted device. A successful exploit could allow the attacker to execute commands with root privileges.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-08-20 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2019-11-26 03:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2022-06-08 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2022-06-22 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-06-17 02:19 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 5.5% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-11-26 03:15 UTC

Last modified

2026-06-17 02:19 UTC

Added to CISA KEV

2022-06-08

Exploit probability

5.5% · EPSS, next 30 days

Weakness

CWE-502 · Unsafe deserialization

Record status

Analyzed

Affected

• Cisco rv016 multi-wan Vpn Firmware < 4.2.3.10
• Cisco rv042 Dual Wan Vpn Firmware < 4.2.3.10
• Cisco rv042g Dual Gigabit Wan Vpn Firmware < 4.2.3.10
• Cisco rv082 Dual Wan Vpn Firmware < 4.2.3.10

Attack profile CVSS 3.1 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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