CVE-2022-27507Network attack vector

Authenticated service interruption via undisclosed resource consumption

Published Jan 24, 2023 · Updated Apr 1, 2025

Uncontrolled resource consumption in Citrix ADC and Citrix Gateway allows remote authenticated users to interrupt service through a VPN vServer. Citrix has not disclosed the resource-consuming operation or request path; affected releases span specified 13.1, 13.0, 12.1, FIPS, and NDcPP branches. Exploitation requires DTLS plus HDX Insight for EDT traffic or SmartControl on a VPN vServer, and the documented consequence is service interruption.

CVSS severity6.5
Medium
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Citrix ADC and Citrix Gateway allows remote authenticated users to interrupt service through a VPN vServer. Citrix has not disclosed the resource-consuming operation or request path; affected releases span specified 13.1, 13.0, 12.1, FIPS, and NDcPP branches. Exploitation requires DTLS plus HDX Insight for EDT traffic or SmartControl on a VPN vServer, and the documented consequence is service interruption.

The record

CVE
CVE-2022-27507
Published
Jan 24, 2023
Updated
Apr 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
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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