CVE-2020-11581 json
An issue was discovered in Pulse Secure Pulse Connect Secure (PCS) through 2020-04-06.
published 2020-04-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-3931
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 9.8%
- EPSS 9.8% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
Summary
An issue was discovered in Pulse Secure Pulse Connect Secure (PCS) through 2020-04-06. The applet in tncc.jar, executed on macOS, Linux, and Solaris clients when a Host Checker policy is enforced, allows a man-in-the-middle attacker to perform OS command injection attacks (against a client) via shell metacharacters to the doCustomRemediateInstructions method, because Runtime.getRuntime().exec() is used.
Exploit prediction
9.84% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- git.lsd.cat https://git.lsd.cat/g/pulse-host-checker-rce referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
- Technology feeds
References
-
git.lsd.cat
/g/pulse-host-checker-rce
exploit, third-party-advisory
-
kb.pulsesecure.net
/articles/Pulse_Security_Advisories/SA44426
vendor-advisory
Sources
- CVE List CVE-2020-11581
- NVD CVE-2020-11581
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.