DaystoPatch

CiscoExploited incident

Cisco Catalyst SD-WAN Manager Vulnerabilities (February 2026: CVE-2026-20128, CVE-2026-20122, CVE-2026-20133)

CVE-2026-20128, CVE-2026-20122, CVE-2026-20133High, CVSS 7.5In CISA's Known Exploited Vulnerabilities catalog since 20 Apr 2026

  • Exploited after a fix existed
FixedFixed for every supported version 33 hours after the first public report.

Response

Silence
0h
First public report to first vendor statement
Exposure
0h
First public report to first fix
Follow-through
33h
First public report to a fix for every supported version
  • Vendor silent
  • Vendor statement, no fix
  • Fixed for some versions
  • Fixed when disclosed
  • Date only, no time of day

Timeline and evidence

Open a moment to see its source and archived quote.

  1. First public report

    Cisco PSIRT advisory cisco-sa-sdwan-authbp-qwCX8D4v, v1.0 (Wayback snapshot 2026-02-25)CuratedQuote verified

    The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

    Coordinated disclosure: the advisory (First Published 2026 February 25 16:00 GMT) was the first public signal and shipped with fixes; it was published the same day as the SD-WAN zero-day cisco-sa-sdwan-rpa-EHchtZk.

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    sha256:6227729fb9ff5802…
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    7 more sources for this moment
    CVE.org record CVE-2026-20133ClaimedQuote verified25 Feb 2026, 16:13 UTC

    A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system.

    CVE record published.

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    Bluesky postClaimedQuote not checked yet25 Feb 2026, 17:00 UTC

    🔗 CVE : CVE-2026-20122, CVE-2026-20126, CVE-2026-20127, CVE-2026-20128, CVE-2026-20129, CVE-2026-20133

    Earliest third-party post we hold.

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    Cisco CSAF for cisco-sa-sdwan-authbp-qwCX8D4v, revision 1.1.0CuratedQuote verified5 Mar 2026, 00:06 UTC

    Updated Exploitation and Public Announcements section to include active exploitation of CVE-2026-20128 and CVE-2026-20122.

    CSAF revision 1.1.0 is dated 2026-03-05T00:06:17+00:00. First public report of exploitation (CVE-2026-20128 and CVE-2026-20122), after fixes existed. Exploitation of CVE-2026-20133 was added in revision 1.3.0 (2026-04-22T15:10:56+00:00), two days after CISA's 2026-04-20 KEV listing.

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    CISA KEV (CVE-2026-20122)ClaimedQuote verified20 Apr 2026

    Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability

    Added to CISA's KEV catalog on 2026-04-20.

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    CISA KEV (CVE-2026-20128)ClaimedQuote verified20 Apr 2026

    Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability

    Added to CISA's KEV catalog on 2026-04-20.

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    CISA KEV (CVE-2026-20133)ClaimedQuote verified20 Apr 2026

    Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability

    Added to CISA's KEV catalog on 2026-04-20.

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    Mastodon postClaimedQuote not checked yet20 Apr 2026, 22:00 UTC

    🚨 [CISA-2026:0420] CISA Adds 8 Known Exploited Vulnerabilities to Catalog ( https:// secdb.nttzen.cloud/security-ad visory/detail/CISA-2026:0420 ) CISA has added 8 new vulnerabilities to its Known

    Earliest third-party post we hold.

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  2. Vendor statement

    at disclosure

    Cisco PSIRT advisory cisco-sa-sdwan-authbp-qwCX8D4vCuratedQuote verified

    First Published: 2026 February 25 16:00 GMT

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  3. First workaround

    No official mitigation found yet.

  4. First fix

    at disclosure

    Cisco PSIRT advisory cisco-sa-sdwan-authbp-qwCX8D4v, v1.0 (Wayback snapshot 2026-02-25)CuratedQuote verified

    Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

    v1.0 fixed releases: 20.12.5.3 / 20.12.6.1, 20.15.4.2, 20.18.2.1 available; 20.9 listed as '20.9.8.2 (Estimated release February 27, 2026)'.

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  5. Fixed for all versions

    +33h

    Cisco CSAF for companion advisory cisco-sa-sdwan-rpa-EHchtZk, revision 1.1.0CuratedQuote verified

    Updated the fixed releases table. Added the link to a public remediation document.

    Revision 1.1.0 (2026-02-27T00:41:24+00:00) of the companion advisory removed the 'Estimated release February 27, 2026' caveat from 20.9.8.2 (Wayback snapshot 2026-02-28). This advisory lists the same 20.9.8.2 build as the 20.9 fix for these CVEs, so the last train had a fix from this time.

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    1 more source for this moment
    Cisco PSIRT advisory cisco-sa-sdwan-authbp-qwCX8D4v, v1.1 (Wayback snapshot 2026-03-05)CuratedQuote verified5 Mar 2026, 00:06 UTC

    In March 2026, the Cisco PSIRT became aware of active exploitation of the vulnerabilities that are described in CVE-2026-20128 and CVE-2026-20122 only.

    This advisory's own table first shows 20.9 -> 20.9.8.2 without the 'Estimated' caveat in v1.1 (CSAF 1.1.0, 2026-03-05T00:06:17+00:00; the quote identifies the v1.1 text). The same 20.9.8.2 build was confirmed available in the companion advisory cisco-sa-sdwan-rpa-EHchtZk at 2026-02-27T00:41:24+00:00, so all trains were likely fixed by 2026-02-27; this advisory was not updated until 2026-03-05. Revision 1.2 (2026-03-18) added the end-of-maintenance 20.10 train (migrate to 20.12.6.1).

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    sha256:dd72b0bf1d421a41…
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This advisory changed after publication

  1. cisco-sa-sdwan-authbp-qwCX8D4v

    Recorded in the revision history

    Cisco Catalyst SD-WAN Vulnerabilities

    Advisory now says the bug is exploited (earlier version: vendor not aware). Version table: 2 rows added and 2 rows removed. One new row reads "20.9 | 20.9.8.2".

    • Exploitation status
    • Fixed versions
    Exploitation status
    Beforevendor not aware of exploitation
    Aftervendor aware of exploitation
    Version table rows
    Before20.9 | 20.9.8.2 (Estimated release February 27, 2026); 20.12.5 20.12.6 | 20.12.5.3 20.12.6.1
    After20.9 | 20.9.8.2; 20.12 | 20.12.5.3 20.12.6.1
    Earlier version captured 25 Feb 2026, 16:37 UTC: archived copyLater version captured 5 Mar 2026, 17:23 UTC: archived copyRecovered from archived copiesSnapshots 429df38b46… and 168418f264…Incident page

Send this to your boss

No brief for this incident yet. We write one for every open incident and every critical bug exploited before a fix.

Affected products

  • Cisco Catalyst SD-WAN Manager
How we built this timeline

One advisory (cisco-sa-sdwan-authbp-qwCX8D4v) fixes five CVEs; three are in KEV (all added 20 Apr 2026) and are tracked here: CVE-2026-20128 (DCA credential file, CVSS 7.5; releases 20.18 and later not affected), CVE-2026-20122 (API arbitrary file overwrite, needs read-only API credentials, CVSS 7.1), CVE-2026-20133 (information disclosure, CVSS 7.5). CVE-2026-20126 and CVE-2026-20129 (same advisory) are not known to be exploited.

Primary CVE: the advisory header leads with CVE-2026-20122 only in numeric order, so we used the highest CVSS among the exploited CVEs (CVE-2026-20128, tied with CVE-2026-20133; chosen because its exploitation was disclosed first). Coordinated disclosure, exploited later: Cisco says it became aware of exploitation in March 2026 (20128, 20122) and April 2026 (20133).

The Fixed for all versions quote is chosen to fingerprint revision 1.1 on the snapshot; the timestamp comes from the CSAF revision history.

Related

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