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CVE-2023-20088

26
FAUCET Score

CVE-2023-20088 is a denial-of-service vulnerability affecting Cisco Finesse's VPN-less reverse proxy due to improper IP address filtering in its nginx configurations. An unauthenticated, remote attacker can exploit this by sending unauthenticated requests, leading to a DoS condition for users connected via a load balancer. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, resulting in high impact to availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 12.6\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:finesse:*:*:*:*:*:*:*:*
12.6\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:finesse:12.6\(1\):-:*:*:*:*:*:*
12.6\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:finesse:12.6\(1\):es01:*:*:*:*:*:*
12.6\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:finesse:12.6\(1\):es02:*:*:*:*:*:*
12.6\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:finesse:12.6\(1\):es03:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
52.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 28th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-finesse-proxy-dos-vY5dQhrV
Vendor Advisory