Buffer overflow in Cloud Software Group Netscaler Adc

CVE-2023-6549

Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read

Vulnerability class: Buffer Overflow

EPSS: 0.802 (99.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-6549?
CVE-2023-6549 is a high-severity vulnerability in Cloud Software Group Netscaler Adc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.2/10. Published 2024-01-17.
How severe is CVE-2023-6549?
High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2023-6549 known to be exploited?
Yes. CVE-2023-6549 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-17), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.