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CVE-2020-3537

Cisco Jabber for Windows Universal Naming Convention Link Handling Vulnerability

MEDIUM
5.7
CVSS Score
Published: September 4, 2020 at 02:25 AM UTC
Updated: June 17, 2026 at 03:18 AM UTC
1 product affected across 1 vendorJabber

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Severity
MEDIUM5.7
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in Cisco Jabber for Windows software could allow an authenticated, remote attacker to gain access to sensitive information. The vulnerability is due to improper validation of message contents. An attacker could exploit this vulnerability by sending specially crafted messages that contain Universal Naming Convention (UNC) links to a targeted user and convincing the user to follow the provided link. A successful exploit could allow the attacker to cause the application to access a remote system, possibly allowing the attacker to gain access to sensitive information that the attacker could use in additional attacks.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Jabber· Cisco
95%
12.1 ≤ v < 12.1.312.5 ≤ v < 12.5.212.6 ≤ v < 12.6.312.7 ≤ v < 12.7.212.8 ≤ v < 12.8.312.9 ≤ v < 12.9.1
Affected range stops below 12.1.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.5.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.6.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.7.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.8.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.9.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisoryx_refsource_CISCO
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-jabber-G3NSjPn7

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.7MEDIUMcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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