CVE-2019-15271 Cisco RV Series Routers: unsafe data loading
In plain words: The program unpacks saved data from outside without checking it is safe. Usually lets an attacker run code on the server.
Confirmed exploited by CISA on · US federal patch deadline Jun 22, 2022
What to do
- Install Cisco's security update for RV Series Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Cisco RV Series Routers Deserialization of Untrusted Data Vulnerability
- Product
- Cisco RV Series Routers
- CISA description
- A deserialization of untrusted data vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an attacker to execute code with root privileges.
- Type of flaw
- Unsafe data loading (CWE-502)
- Confirmed exploited
- Jun 8, 2022
- US federal patch deadline
- Jun 22, 2022
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Answering about CVE-2019-15271 ·
Questions about CVE-2019-15271
Is CVE-2019-15271 being exploited?
Yes. CISA added CVE-2019-15271 to its Known Exploited Vulnerabilities catalog on Jun 8, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2019-15271?
Install Cisco's security update for RV Series Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2019-15271?
Only if you use Cisco RV Series Routers. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.