Medium
wireguard — security advisory
WireGuard, such as WireGuard 0.5.3 on Windows, does not fully account for the possibility that an adversary might be able to set a victim's system time to a future value, e.g., because unauthenticated NTP is used. This can lead to an outcome in which one static private key becomes permanently useless.
- Products
- wireguard
- Affected versions
- 0.0.20190913-1ubuntu1, 0.0.20191212-1ubuntu1, 0.0.20191219-1ubuntu1, 1.0.20200102-1ubuntu1, 1.0.20200121-1ubuntu1, 1.0.20200121-2ubuntu1, 1.0.20200206-1ubuntu1, 1.0.20200206-2ubuntu1, 1.0.20200319-1ubuntu1, 1.0.20200513-1~16.04.1, 1.0.20200513-1~16.04.2, 1.0.20200513-1~18.04.1, 1.0.20200513-1~18.04.2, 1.0.20200513-1~20.04.1, 1.0.20200513-1~20.04.2, 1.0.20210424-1ubuntu1, 1.0.20210914-1.1ubuntu2, 1.0.20210914-1ubuntu1, 1.0.20210914-1ubuntu2, 1.0.20210914-1ubuntu3, 1.0.20210914-1ubuntu4, 1.0.20210914-3ubuntu1, 1.0.20210914-3ubuntu2, 1.0.20250521-1ubuntu1, 1.0.20260223-1ubuntu1, 1.0.20260223-1ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2021-46873
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:55 UTC · Revision 1
Source evidence
WireGuard, such as WireGuard 0.5.3 on Windows, does not fully account for the possibility that an adversary might be able to set a victim's system time to a future value, e.g., because unauthenticated NTP is used. This can lead to an outcome in which one static private key becomes permanently useless.
osv:UBUNTU-CVE-2021-46873
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
wireguard
Fixed versions: Not specified
Complete source record
{
"id": "d77515ee8575e9c4bdf86acdcff867f476f68135111255261e558a2044db182b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-46873",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-46873",
"summary": "WireGuard, such as WireGuard 0.5.3 on Windows, does not fully account for the possibility that an adversary might be able to set a victim's system time to a future value, e.g., because unauthenticated NTP is used. This can lead to an outcome in which one static private key becomes permanently useless.",
"evidence": "osv:UBUNTU-CVE-2021-46873",
"products": [
{
"name": {
"value": "wireguard",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20200513-1~16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.20200513-1~16.04.2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20200513-1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.20200513-1~18.04.2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0.20190913-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "0.0.20191212-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "0.0.20191219-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200102-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200121-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200121-2ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200206-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200206-2ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200319-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200513-1~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.20200513-1~20.04.2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20210424-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "1.0.20210914-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "1.0.20210914-1ubuntu2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20210914-1ubuntu3",
"evidence": "/affected/4/versions"
},
{
"value": "1.0.20210914-1ubuntu4",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20210914-1.1ubuntu2",
"evidence": "/affected/5/versions"
},
{
"value": "1.0.20210914-3ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "1.0.20210914-3ubuntu2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20250521-1ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.0.20260223-1ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.0.20260223-1ubuntu2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "wireguard",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20210914-3ubuntu2",
"evidence": "/affected/7/versions"
},
{
"value": "1.0.20250521-1ubuntu1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2021-46873",
"aliases": [
"UBUNTU-CVE-2021-46873"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.0.20200513-1~16.04.1",
"1.0.20200513-1~16.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20200513-1~16.04.2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20200513-1~16.04.2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.0.20200513-1~18.04.1",
"1.0.20200513-1~18.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20200513-1~18.04.2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20200513-1~18.04.2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.0.20190913-1ubuntu1",
"0.0.20191212-1ubuntu1",
"0.0.20191219-1ubuntu1",
"1.0.20200102-1ubuntu1",
"1.0.20200121-1ubuntu1",
"1.0.20200121-2ubuntu1",
"1.0.20200206-1ubuntu1",
"1.0.20200206-2ubuntu1",
"1.0.20200319-1ubuntu1",
"1.0.20200513-1~20.04.1",
"1.0.20200513-1~20.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20200513-1~20.04.2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20200513-1~20.04.2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.0.20210424-1ubuntu1",
"1.0.20210914-1ubuntu1",
"1.0.20210914-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20210914-1ubuntu2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20210914-1ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.0.20210914-1ubuntu3",
"1.0.20210914-1ubuntu4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20210914-1ubuntu4"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20210914-1ubuntu4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.0.20210914-1.1ubuntu2",
"1.0.20210914-3ubuntu1",
"1.0.20210914-3ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20210914-3ubuntu2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20210914-3ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.0.20250521-1ubuntu1",
"1.0.20260223-1ubuntu1",
"1.0.20260223-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20260223-1ubuntu2"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20260223-1ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wireguard",
"purl": "pkg:deb/ubuntu/wireguard?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.0.20210914-3ubuntu2",
"1.0.20250521-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-46873.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "wireguard",
"binary_version": "1.0.20250521-1ubuntu1"
},
{
"binary_name": "wireguard-tools",
"binary_version": "1.0.20250521-1ubuntu1"
}
]
}
}
],
"modified": "2026-10-17T12:56:16.215452625Z",
"provider": "osv",
"upstream": [
"CVE-2021-46873"
],
"references": [
"https://ubuntu.com/security/CVE-2021-46873",
"https://lists.zx2c4.com/pipermail/wireguard/2021-August/006916.html",
"https://www.cve.org/CVERecord?id=CVE-2021-46873"
]
},
"related_cves": [
{
"value": "CVE-2021-46873",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355095,
"published_at": "2023-01-29T23:15:00+00:00"
}