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CVE-2022-21826

35
FAUCET Score

CVE-2022-21826 describes a client-side HTTP request smuggling vulnerability affecting Pulse Secure versions 9.115 and below, specifically Ivanti Connect Secure and Pulse Connect Secure products. This vulnerability allows a malicious actor to prepend leftover POST request bodies to subsequent HTTP requests on the same connection, potentially leading to Cross-Site Scripting (XSS). With a CVSS score of 5.4 (Medium), exploitation requires user interaction and low privileges, with a low impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
9.1CPE matchmatch criteria
cpe:2.3:a:ivanti:connect_secure:9.1:-:*:*:*:*:*:*
9.1CPE matchmatch criteria
cpe:2.3:a:ivanti:connect_secure:9.1:r1:*:*:*:*:*:*
9.1CPE matchmatch criteria
cpe:2.3:a:ivanti:connect_secure:9.1:r1.0:*:*:*:*:*:*
9.1CPE matchmatch criteria
cpe:2.3:a:ivanti:connect_secure:9.1:r10.0:*:*:*:*:*:*
9.1CPE matchmatch criteria
cpe:2.3:a:ivanti:connect_secure:9.1:r10.2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
45.23%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.4523 is in the 100th percentile among its peer group of 15,239 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kb.pulsesecure.net / articles/Pulse_Security_Advisories/Client-Side-Desync-Attack
Vendor Advisory