CVE-2020-9331: CryptoPro CSP through 5.0.0.10004 on 32-bit platforms allows Local Privilege Escalation (by local users with t

Q: How do I fix CVE-2020-9331?

csp: upgrade to 5.0.0.10004. Exact commands for each OS are on this page.

Q: Is CVE-2020-9331 being exploited?

CVE-2020-9331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-9331 affect?

CVE-2020-9331 affects csp. Severity is high (CVSS 7.8). CryptoPro CSP through 5.0.0.10004 on 32-bit platforms allows Local Privilege Escalation (by local users with the SeChangeNotifyPrivilege right) because user-mode input is mishandled during process creation. An attacker can write arbitrary d

Q: How urgent is CVE-2020-9331?

Priority 41/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADE

CVE-2020-9331 is a high-severity flaw (CVSS 7.8) affecting csp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CryptoPro CSP through 5.0.0.10004 on 32-bit platforms allows Local Privilege Escalation (by local users with the SeChangeNotifyPrivilege right) because user-mode input is mishandled during process creation. An attacker can write arbitrary data to an arbitrary location in the kernel's address space.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Published	2020-10-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cryptopro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-23 05:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

cryptopro csp UPGRADE

Affected: < 5.0.0.10004

Fixed in: 5.0.0.10004

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy csp || rpm -q csp || csp --version

2. UPGRADE to 5.0.0.10004 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade csp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade csp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-9331?

csp: upgrade to 5.0.0.10004. Exact commands for each OS are on this page.

Is CVE-2020-9331 being exploited?

CVE-2020-9331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-9331 affect?

CVE-2020-9331 affects csp. Severity is high (CVSS 7.8). CryptoPro CSP through 5.0.0.10004 on 32-bit platforms allows Local Privilege Escalation (by local users with the SeChangeNotifyPrivilege right) because user-mode input is mishandled during process creation. An attacker can write arbitrary d

How urgent is CVE-2020-9331?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2020-9361 MEDIUM 5.5 UPGRADE CryptoPro CSP through 5.0.0.10004 on 64-bit platforms allows local users with the SeChangeNotifyPrivilege righ

References

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