5.8

CVE-2023-20190: cisco cisco ios xr software

CVSS: 5.8v3.1MediumModified
Published 13-09-2023Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2023-20190 is a medium (CVSS 5.8) vulnerability in cisco cisco ios xr software. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.71%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 13-09-2023
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the classic access control list (ACL) compression feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to incorrect destination address range encoding in the compression module of an ACL that is applied to an interface of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting. There are workarounds that address this vulnerability. This advisory is part of the September 2023 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2023 Semiannual Cisco IOS XR Software Security Advisory Bundled Publication .

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.71%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

0.00 pp

From 0.71% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.71%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (sec.cloudapps.cisco.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco ios xr software5.2.0 | 5.2.1 | 5.2.2 | 5.2.4 | 5.2.3 | 5.2.5 | 5.2.47 | 5.3.0 | 5.3.1 | 5.3.2 | 5.3.3 | 5.3.4 | 6.0.0 | 6.0.1 | 6.0.2 | 6.1.1 | 6.1.2 | 6.1.3 | 6.1.4 | 6.1.12 | 6.1.22 | 6.1.32 | 6.1.36 | 6.1.42 | 6.2.1 | 6.2.2 | 6.2.3 | 6.2.25 | 6.2.11 | 6.3.2 | 6.3.3 | 6.3.15 | 6.4.1 | 6.4.2 | 6.4.3 | 6.5.1 | 6.5.2 | 6.5.3 | 6.5.25 | 6.5.26 | 6.5.28 | 6.5.29 | 6.5.32 | 6.5.33 | 6.6.2 | 6.6.3 | 6.6.25 | 6.6.4 | 7.0.1 | 7.0.2 | 7.0.12 | 7.0.14 | 7.1.1 | 7.1.15 | 7.1.2 | 7.1.3 | 6.7.1 | 6.7.2 | 6.7.3 | 6.7.4 | 7.2.0 | 7.2.1 | 7.2.2 | 7.3.1 | 7.3.15 | 7.3.2 | 7.3.3 | 7.4.1 | 7.4.2 | 6.8.1 | 6.8.2 | 7.5.1 | 7.5.3 | 7.5.2 | 7.6.1 | 7.6.2 | 7.7.1 | 7.7.2 | 6.9.1 | 6.9.2 | 7.8.1
  • ios_xr< 7.3.5 | ≥ 7.5, < 7.5.4 | ≥ 7.6, < 7.8.2 | 7.9

1 vendor · 2 products

References

1 links