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ExploitedIn CISA KEVFix available

CVE-2019-15271

Exploitation confirmed. First attested on 2022-06-08 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2019-11-26
  • Fixed in4.2.3.10
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-11-2603:15CVE publishedNVD
  2. 2022-06-08Added to the CISA KEV catalogCISA KEV
  3. 2022-06-08Listed as exploited by GCVEGCVE
  4. 2022-06-08Exploitation first reportedCISA KEV
  5. 2024-11-0817:19SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-15271?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-15271?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco rv016 multi-wan vpn firmwareversion to verify
BranchAffectedFixed in
4.2< 4.2.3.104.2.3.10
Cisco rv042 dual wan vpn firmwareversion to verify
BranchAffectedFixed in
4.2< 4.2.3.104.2.3.10
Cisco rv042g dual gigabit wan vpn firmwareversion to verify
BranchAffectedFixed in
4.2< 4.2.3.104.2.3.10

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As cisco, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Cisco Small Business RV Series Router Firmware

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2019-11-26

Fix

  1. Update Cisco rv016 multi-wan vpn firmware to 4.2.3.10
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-06-22

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-06-08
Patch Due Date
2022-06-22
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

  • CISA KEVKEV entry2022-06-08
  • ENISA EUVDexploitation2022-06-082022-06-08
  • GCVEexploitation2022-06-08
  • CISA-ADPSSVC decisionactive2024-11-08
  • OpenCVESSVC decisionactive—
  • NVDCVSS 3.18.8read 2026-10-23
  • CNACVSS 3.08.8known since 2026-10-23
  • NVDCVSS 2.09read 2026-10-23
  • CNAweakness (CWE)CWE-502known since 2026-10-23
  • NVDweakness (CWE)CWE-502read 2026-10-23
  • FIRST EPSSEPSS score5.5 %2026-11-03
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2019-11-26
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-87q2-rr35-r6c9

Frequently asked questions

What is CVE-2019-15271?

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.

Is CVE-2019-15271 actively exploited?

Yes. CVE-2019-15271 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-06-22.

What is the CVSS score for CVE-2019-15271?

CVE-2019-15271 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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