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CVE-2024-20276

22
FAUCET Score

CVE-2024-20276 is a denial-of-service vulnerability affecting Cisco IOS Software on Cisco Catalyst 6000 Series Switches, including specific Catalyst 6500 and 6800 models. An unauthenticated, adjacent attacker can exploit improper handling of process-switched traffic by sending crafted data, causing the device to unexpectedly reload. This vulnerability has a CVSS score of 7.4 (High), indicating a significant impact on availability with low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
15.5\(1\)sy5CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.5\(1\)sy5:*:*:*:*:*:*:*
15.5\(1\)sy6CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.5\(1\)sy6:*:*:*:*:*:*:*
15.5\(1\)sy7CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.5\(1\)sy7:*:*:*:*:*:*:*
15.5\(1\)sy8CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.5\(1\)sy8:*:*:*:*:*:*:*
15.5\(1\)sy9CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.5\(1\)sy9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 18th percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 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-ios-dos-Hq4d3tZG
Vendor Advisory