CVE-2021-3057
No exploitation reported by the sources we read.
- Published2021-10-13
- Fixed in5.3.1 · 5.2.8 · 5.1.9
- WeaknessCWE-121 · CWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a man-in-the-middle attacker to disrupt system processes and potentially execute arbitrary code with SYSTEM privileges. This issue impacts: GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.9 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on Windows; GlobalProtect app 5.2 versions earlier than GlobalProtect app 5.2.8 on the Universal Windows Platform; GlobalProtect app 5.3 versions earlier than GlobalProtect app 5.3.1 on Linux.
Timeline
dates in UTC- 2021-10-1316:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-3057?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-3057?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.3 | ≥ 5.3, < 5.3.1 | 5.3.1 | NVD |
| 5.2 | ≥ 5.2, < 5.2.8 | 5.2.8 | NVD |
| 5.1 | ≥ 5.1, < 5.1.9 | 5.1.9 | NVD |
| 5.0 | ≥ 5.0, ≤ 5.0.8 | no fix published | NVD |
| 5.0 | ≥ 5.0, ≤ 5.0.9 | no fix published | NVD |
| 5.0 | ≥ 5.0, ≤ 5.0.10 | no fix published | NVD |
| 5.1 | ≥ 5.1, ≤ 5.1.1 | no fix published | NVD |
| 5.1 | ≥ 5.1.0, ≤ 5.1.4 | no fix published | NVD |
| 5.0 | = 5.0 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Paloaltonetworks globalprotect to 5.3.1 · 5.2.8 · 5.1.9
Advisories and patches
- security.paloaltonetworks.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.18.1read 2026-10-23
- NVDCVSS 2.09.3read 2026-10-23
- CNAweakness (CWE)CWE-121read 2026-10-23
- NVDweakness (CWE)CWE-787read 2026-10-23
- FIRST EPSSEPSS score1.4 %2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-10-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-3057?
Is CVE-2021-3057 actively exploited?
What is the CVSS score for CVE-2021-3057?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.