What is the CVSS score of CVE-2021-21886?

CVE-2021-21886 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 1.9%.

Is there a public PoC exploit available for CVE-2021-21886?

Yes, a public proof-of-concept exploit is available for CVE-2021-21886. Prioritise patching immediately. EPSS: 1.9%.

Premierwave 2050 Firmware CVE-2021-21886

MEDIUM

Path Traversal (CWE-22)

2021-12-22 talos-cna@cisco.com

Path Traversal Information Disclosure Premierwave 2050 Firmware

4.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Dec 22, 2021 - 19:15 nvd

MEDIUM 4.3

DescriptionNVD

A directory traversal vulnerability exists in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially crafted HTTP request can lead to information disclosure. An attacker can make an authenticated HTTP request to trigger this vulnerability.

AnalysisAI

A directory traversal vulnerability exists in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. A directory traversal vulnerability exists in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially crafted HTTP request can lead to information disclosure. An attacker can make an authenticated HTTP request to trigger this vulnerability. Affected products include: Lantronix Premierwave 2050 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.