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CVE-2020-3361

31
FAUCET Score

CVE-2020-3361 is a critical vulnerability affecting Cisco Webex Meetings and Webex Meetings Server, stemming from improper handling of authentication tokens. An unauthenticated, remote attacker can exploit this by sending crafted requests, potentially gaining full control over another user's account within the Webex site. With a CVSS score of 9.8, this vulnerability is highly severe, allowing for complete compromise of confidentiality, integrity, and availability without user interaction. While not currently listed on the KEV catalog and lacking public exploit code, it has garnered some community discussion and media coverage, indicating awareness of its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 39.5.25CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings:*:*:*:*:*:*:*:*
>= 40.1.0, <= 40.4.10CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings:*:*:*:*:*:*:*:*
40.6.0CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings:40.6.0:*:*:*:*:*:*:*
< 4.0CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings_server:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:cisco:webex_meetings_server:4.0:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.36%
Probability of exploitation in next 30 days
EPSS Percentile
82.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0236 is in the 72nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-token-zPvEjKN
Vendor Advisory