CVE-2018-11541: A root privilege escalation vulnerability in the Sonus SBC 1000 / SBC 2000 / SBC SWe Lite web interface allows

This month

CRITICAL 9.8REMOTEMITIGATEMITIGATEDOWNGRADE

CVE-2018-11541 is a critical-severity flaw (CVSS 9.8) affecting sonus sbc 1000 firmware, sonus sbc 2000 firmware, sbc swe lite web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A root privilege escalation vulnerability in the Sonus SBC 1000 / SBC 2000 / SBC SWe Lite web interface allows unauthorised access to privileged content via an unspecified vector. It affects the 1000 and 2000 devices 6.0.x up to Build 446, 6.1.x up to Build 492, and 7.0.x up to Build 485. It affects the SWe Lite devices 6.1.x up to Build 111 and 7.0.x up to Build 140.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-862
Published	2018-07-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ribboncommunications

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-09 12:29 UTCPublished CVE record published
2026-06-17 01:36 UTCUpdated Record last modified

ribboncommunications sonus sbc 1000 firmware MITIGATE

Affected: 6.0.0 · 6.1.0 · 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

ribboncommunications sonus sbc 2000 firmware MITIGATE

Affected: 6.0.0 · 6.1.0 · 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

ribboncommunications sbc swe lite web DOWNGRADE

Affected: 6.1.0 · 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1.0

1. Check installed version

apt-cache policy sbc-swe-lite-web || rpm -q sbc-swe-lite-web || sbc-swe-lite-web --version

2. No fixed release: DOWNGRADE to a release before 6.1.0 (Debian / Ubuntu)

apt-cache madison sbc-swe-lite-web sudo apt install sbc-swe-lite-web=<VERSION_BEFORE_6.1.0> sudo apt-mark hold sbc-swe-lite-web

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sbc-swe-lite-web sudo dnf downgrade sbc-swe-lite-web-<VERSION_BEFORE_6.1.0> sudo dnf versionlock add sbc-swe-lite-web

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-11541?

sonus sbc 1000 firmware: mitigate or apply the listed mitigation; sonus sbc 2000 firmware: mitigate or apply the listed mitigation; sbc swe lite web: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-11541 being exploited?

CVE-2018-11541 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-11541 affect?

CVE-2018-11541 affects sonus sbc 1000 firmware, sonus sbc 2000 firmware, sbc swe lite web. Severity is critical (CVSS 9.8). A root privilege escalation vulnerability in the Sonus SBC 1000 / SBC 2000 / SBC SWe Lite web interface allows unauthorised access to privileged content via an unspecified vector. It affects the 1000 and 2000 devices 6.0.x up to Build 446,

How urgent is CVE-2018-11541?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-11543 HIGH 7.5 MITIGATE MITIGATE A Local File Inclusion (LFI) vulnerability in the Sonus SBC 1000 / SBC 2000 / SBC SWe Lite web interface allow
CVE-2018-11542 CRITICAL 9.8 MITIGATE MITIGATE A Remote Command Execution (RCE) vulnerability in the Sonus SBC 1000 / SBC 2000 / SBC SWe Lite web interface a

References

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