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CVE-2023-20118 — Cisco Small Business RV Series Routers Command Injection Vulnerability

CVE-2023-20118 · Cisco Small Business RV Series Router Firmware ·…

In brief

Severity · CVSS
High7.2CVSS 3.1, High
EPSS
54%
CISA KEV
Known exploited, listed since 3 Mar 2025
CERT-FR
No advisory or alert referenced in the catalog
Vendor
Cisco
Published · Modified
·
Last verified

Summary

A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary commands on an affected device. This vulnerability is due to improper validation of user input within incoming HTTP packets. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface. A successful exploit could allow the attacker to gain root-level privileges and access unauthorized data. To exploit this vulnerability, an attacker would need to have valid administrative credentials on the affected device. Cisco has not and will not release software updates that address this vulnerability. However, administrators may disable the affected feature as described in the Workarounds ["#workarounds"] section. {{value}} ["%7b%7bvalue%7d%7d"])}]]

Weakness: CWE-77

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

6 branches without a precise fixed release

Cisco Small Business RV Series Router Firmware

Source: CVE-2023-20118cisco-sa-sbr042-multi-vuln-ej76Pke5

  1. 1.5
    Affected versions1.5.1.5, 1.5.1.11, 1.5.1.13
    First fixed releaseNot published in the sources followed
  2. 1.4
    Affected versions1.4.2.15, 1.4.2.17, 1.4.2.19, 1.4.2.20
    5 releases listed1.4.2.15, 1.4.2.17, 1.4.2.19, 1.4.2.20, 1.4.2.22
    First fixed releaseNot published in the sources followed
  3. 1.3
    Affected versions1.3.1.10, 1.3.1.12, 1.3.2.2
    First fixed releaseNot published in the sources followed
  4. 1.2
    Affected versions1.2.1.13, 1.2.1.14
    First fixed releaseNot published in the sources followed
  5. 1.1
    Affected versions1.1.0.9, 1.1.1.6, 1.1.1.19
    First fixed releaseNot published in the sources followed
  6. 1.0
    Affected versions1.0.1.17, 1.0.2.3
    First fixed releaseNot published in the sources followed

The vendor states fixes are available; the releases per branch are in its advisory.

Remediation

Fix available

Vendor fix

Cisco has released updates that fix this vulnerability; its advisory lists them.

SourceCisco Security Advisory cisco-sa-sbr042-multi-vuln-ej76Pke5· revised 7 Mar 2025

Mitigation (vendor)

Cisco describes a workaround or a mitigation in its advisory.

SourceCisco Security Advisory cisco-sa-sbr042-multi-vuln-ej76Pke5

CISA KEV required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA due date:

SourceCISA KEV

Last verified 1 Oct 2026 at 09:29 UTC

Known exploitation

Added to CISA KEV on 3 Mar 2025

Federal remediation due date: 24 Mar 2025

The CISA required action is shown under Remediation.

54% probability of exploitation in the next 30 days (percentile 99%).

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CERT-FR

No CERT-FR advisory or alert of the last two years references this CVE, for the vendors Patcharo covers.

Timeline

  1. Published by the source
  2. Added to CISA KEV
  3. CISA remediation due date
  4. Source record last modified
  5. EPSS score computed
  6. Last verified by Patcharo

Official sources

References

Cisco · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS · Cisco Security Advisory cisco-sa-sbr042-multi-vuln-ej76Pke5

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: Cisco Secure Firewall release trains: Threat Defense, Management Center and ASA versions explained