CVE-2026-76302

CRITICAL 9.9

Published 2026-10-21 · Last modified 2026-10-22

As part of Cisco's ongoing commitment to proactive security and product quality, Cisco has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76302 are related to improper neutralization and are grouped under the Common Weakness Enumeration (CWE) CWE-707.

ELEVATED IMPACT

Severe if exploited (CVSS 9.9), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 34th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

9.9CVSS 3.1 · CRITICAL

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
⚠Privileges: Requires a low-privilege account
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T13:52:32.101Z

Affected

Vendors Splunk

Products Splunk Enterprise

Weakness (CWE)

CWE-707: The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties at met before being read from an upstream component or sent to a downstream component.

CVSS vector

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

References and research data (JSON)

All CVSS metrics

CRITICAL 9.9 v3.1 · ADP Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CRITICAL 9.9 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-107649 ADVISORYEUVD · EUVD-2026-107649

Technical & other

https://advisory.splunk.com/advisories/SVD-2026-1008CVE record · cisco · Updated 2026-10-21T22:52:03.886Z
NVD · CVE-2026-76302 · Updated 2026-10-22T16:57:10.180

Sources: NVD · CVE.org · EPSS