SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-31923

Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.

MEDIUM 5.3EPSS 0.71%

Does this matter?

Lower severity and a low EPSS score (0.71%). Track it; it rarely justifies an emergency change on its own.

Description

Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.

CVSS 3.1
5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
0.71% probability · 53th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-444
Affected
pingidentity/pingaccess
Source
responsible-disclosure@pingidentity.com
EPSS trend
0%3%5%26 October 2026: 0.71%26 October 202626 October 2026

EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.