The Flex-VPN load-balancing feature in the ipsec-ikev2 implementation in Cisco IOS before…
Priority LOW 31CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
The Flex-VPN load-balancing feature in the ipsec-ikev2 implementation in Cisco IOS before 15.1(1)SY3 does not require authentication, which allows remote attackers to trigger the forwarding of VPN traffic to an attacker-controlled destination, or the discarding of this traffic, by arranging for an arbitrary device to become a cluster member, aka Bug ID CSCub93641.
Why it matters now
EPSS 0.01282 70th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.1\(1\)sy2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.1\(1\)sy:*:*:*:*:*:*:* | 15.1(1)sy | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.1\(1\)sy1:*:*:*:*:*:*:* | 15.1(1)sy1 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.1\(1\)sy2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.1\(1\)sy:*:*:*:*:*:*:* Versions 15.1(1)sy Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.1\(1\)sy1:*:*:*:*:*:*:* Versions 15.1(1)sy1 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2012-5032
- 2026-10-03 Alias added: GHSA-qpqj-275w-f6mr
References
More Cisco Ios vulnerabilities
- TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2012-5032 · CVE Program
- CVE-2012-5032 · NVD
- FIRST EPSS
- GHSA-qpqj-275w-f6mr · GitHub Advisory Database · CC BY 4.0
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