Frequently asked questions about the continued exploitation of Cisco Catalyst SD-WAN vulnerabilities (CVE-2026-20182)
2026-05-15T08:52:16Z•00c2abd9cbcf0ff6dff1bfb30bae4efdccbd2c5341d7496aa70d795ae95fbcb7
CISA Emergency Directive 26-03CiscoCisco Catalyst SD-WANSD-WANUAT-8616active exploitationauthentication bypasspatch availableproof-of-conceptzero-day
What happened
Tenable RSO reports active exploitation of multiple critical authentication-bypass vulnerabilities in Cisco Catalyst SD‑WAN Controller and Manager, most notably CVE-2026-20182 (CVSSv3 10.0), which has been used as a zero-day by a sophisticated actor tracked as UAT-8616. Cisco originally disclosed related SD‑WAN flaws on Feb 25, 2026 (including CVE-2026-20127, CVE-2026-20133, CVE-2026-20128, CVE-2026-20122). After public proof‑of‑concept code appeared, at least 10 additional threat clusters began exploiting SD‑WAN vulnerabilities. Patches are available for all supported Catalyst SD‑WAN releases
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- tenable_blog
- Record identifier
- 00c2abd9cbcf0ff6dff1bfb30bae4efdccbd2c5341d7496aa70d795ae95fbcb7
- Enrichment time
- 2026-05-15T08:52:16Z
- AI-assisted enrichment
- Yes
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