CVE-2026-88776Network attack vector

Service interruption via Oracle load-balancer memory overflow

Published Sep 27, 2026 · Updated Sep 27, 2026

Memory overflow in Citrix ADC and Citrix Gateway before 13.1-64.23 and 14.1-73.37 allows remote attackers to interrupt service. Citrix has not disclosed the affected parser or the operation that overflows memory while processing traffic for an Oracle load-balancing virtual server. Exposure requires an Oracle-type load-balancing virtual server, and exploitation produces erroneous behavior or service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory overflow in Citrix ADC and Citrix Gateway before 13.1-64.23 and 14.1-73.37 allows remote attackers to interrupt service. Citrix has not disclosed the affected parser or the operation that overflows memory while processing traffic for an Oracle load-balancing virtual server. Exposure requires an Oracle-type load-balancing virtual server, and exploitation produces erroneous behavior or service interruption.

The record

CVE
CVE-2026-88776
Published
Sep 27, 2026
Updated
Sep 27, 2026
Vendor
Citrix
Product
Citrix ADC
Classifications
CWE-119, T1499
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <13.1.37.279 FIPS and NDcPP
  2. Affected versionversion=0 <13.1-64.23
  3. Affected versionversion=0 <14.1-73.37
  4. Affected versionversion=0 <14.1-73.37 FIPS

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Citrix · Citrix ADCversion=0 <13.1.37.279 FIPS and NDcPP; version=0 <13.1-64.23; version=0 <14.1-73.37; version=0 <14.1-73.37 FIPS
Citrix · Citrix Gatewayversion=0 <13.1-64.23; version=0 <14.1-73.37

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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