CVE-2025-62291: strongswan security update
Affects strongswanSource GCVE Database
Not known to be exploited · CVSS 8.1 High : upgrade to 5.7.2-21.oe2003sp4 soon.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 62% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.7.2-21.oe2003sp4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Upgrade strongswan to 5.7.2-21.oe2003sp4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
openEuler:20.03-LTS-SP4strongswanpkg:rpm/openEuler/strongswan&distro=openEuler-20.03-LTS-SP4Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available for this vulnerability. Users should upgrade strongSwan to version 6.0.3 or later to remediate this issue. Versions prior to 5.7.2-21.oe2003sp4 are affected. No additional mitigation steps are indicated beyond applying the official fix.
Description
A heap-based buffer overflow vulnerability exists in the eap-mschapv2 plugin (client-side) of strongSwan before version 6.0.3. This occurs due to an integer underflow triggered by a malicious EAP-MSCHAPv2 server sending a crafted message of size 6 through 8. The vulnerability affects strongSwan versions prior to 5.7.2-21.oe2003sp4 and has a high severity rating with a CVSS score of 8.1.
References
- wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2427.json (opens in a new tab)
- wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2427 (opens in a new tab)
- strongswan.org/blog/2025/10/27/strongswan-6.0.3-released.html (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2025-October/023073.html (opens in a new tab)
- lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/QKWVJRFXKCQ4DRJGGKCK4MYNNW5YEQFP/ (opens in a new tab)
- lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/QVE27CU4U3DGHAD4EVF75YM3RK423ZQS/ (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2025-October/023086.html (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2025-November/023139.html (opens in a new tab)
- lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/BS2PEH6X6ZL4A4PP4VGM4VGTSU7AIB5K/ (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/11/msg00002.html (opens in a new tab)
- wiki.securepoint.de/UTM/Changelog (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2025-December/023502.html (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-6888affe44 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-a1bc6c7e62 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-bd04c426b3 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-43e98c9972 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9b6d13e4b9 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-ea9af18b11 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-2d8dd834d8 (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-67a9805962 (opens in a new tab)
- openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4071 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2025-62291 (opens in a new tab)