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CVE-2020-11733

18
FAUCET Score

CVE-2020-11733 is a critical vulnerability affecting Spirent TestCenter and Avalanche appliance admin interface firmware, specifically chassis versions 5.08 and earlier. An attacker with existing access to an SSH restricted shell, which is available via default credentials, can escalate privileges to root by exploiting shell metacharacters. This allows for full compromise of the appliance, including reading sensitive configuration files and potentially executing arbitrary code. The vulnerability has a CVSS score of 6.7 (Medium) due to its high impact on confidentiality, integrity, and availability, though it requires high privileges and local access. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.08CPE matchmatch criteria
cpe:2.3:a:spirent:avalanche:*:*:*:*:*:*:*:*
<= 5.08CPE matchmatch criteria
cpe:2.3:a:spirent:testcenter:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.56%
Probability of exploitation in next 30 days
EPSS Percentile
72.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0156 is in the 99th percentile among its peer group of 3,720 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gist.github.com / a05110511t/65d07bc776d7c11b4ccf112a09cca4ab
Third Party Advisory
github.com / a05110511t/CVE/blob/master/CVE-2020-11733.md
Third Party Advisory