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Vulnerabilities / CVE-2026-20122

CVE-2026-20122

Published 2026-02-25 · published (not yet in NVD)

CVE-2026-20122

Cisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability

Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-04-20, with a fix-by date of 2026-04-23. Patch it first.

Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

5.4 MEDIUM
CVSS 3.1 · CNA
26%
chance of exploitation in the next 30 days (EPSS; higher than 97% of CVEs)

A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.

Scores

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NCNA

Affected products

  • Cisco Cisco Catalyst SD-WAN Manager: 20.1.12; 19.2.1; 18.4.4; 18.4.5; 20.1.1.1; 20.1.1; 19.3.0; 19.2.2; 19.2.099; 18.3.6; 18.3.7; 19.2.0; 18.3.8; 19.0.0; 19.1.0; 18.4.302; 18.4.303; 19.2.097; 19.2.098; 17.2.10; 18.3.6.1; 19.0.1a; 18.2.0; 18.4.3; 18.4.1; 17.2.8; 18.3.3.1; 18.4.0; 18.3.1; 17.2.6; 17.2.9; 18.3.4; 17.2.5; 18.3.1.1; 18.3.5; 18.4.0.1; 18.3.3; 17.2.7; 17.2.4; 18.3.0; 19.2.3; 18.4.501_ES; 20.3.1; 20.1.2; 19.2.929; 19.2.31; 20.3.2; 19.2.32; 20.3.2_925; 20.3.2.1; 20.3.2.1_927; 18.4.6; 20.1.2_937; 20.4.1; 20.3.2_928; 20.3.2_929; 20.4.1.0.1; 20.3.2.1_930; 19.2.4; 20.5.0.1.1; 20.4.1.1; 20.3.3; 19.2.4.0.1; 20.3.2_937; 20.3.3.1; 20.5.1; 20.1.3; 20.3.3.0.4; 20.3.3.1.2; 20.3.3.1.1; 20.4.1.2; 20.3.3.0.2; 20.4.1.1.5; 20.4.1.0.01; 20.4.1.0.02; 20.3.3.1.7; 20.3.3.1.5; 20.5.1.0.1; 20.3.3.1.10; 20.3.3.0.8; 20.4.2; 20.4.2.0.1; 20.3.4; 20.3.3.0.14; 19.2.4.0.8; 19.2.4.0.9; 20.3.4.0.1; 20.3.2.0.5; 20.6.1; 20.5.1.0.2; 20.3.3.0.17; 20.6.1.1; 20.6.0.18.3; 20.3.2.0.6; 20.6.0.18.4; 20.4.2.0.2; 20.3.3.0.16; 20.3.4.0.5; 20.6.1.0.1; 20.3.4.0.6; 20.6.2; 20.7.1EFT2; 20.3.4.0.9; 20.3.4.0.11; 20.4.2.0.4; 20.3.3.0.18; 20.7.1; 20.6.2.1; 20.3.4.1; 20.5.1.1; 20.4.2.1; 20.4.2.1.1; 20.3.4.1.1; 20.3.813; 20.3.4.0.19; 20.4.2.2.1; 20.5.1.2; 20.3.4.2; 20.3.814; 20.4.2.2; 20.6.2.2; 20.3.4.2.1; 20.7.1.1; 20.3.4.1.2; 20.6.2.2.2; 20.3.4.0.20; 20.6.2.2.3; 20.4.2.2.2; 20.3.5; 20.6.2.0.4; 20.4.2.2.3; 20.3.4.0.24; 20.6.2.2.7; 20.6.3; 20.3.4.2.2; 20.4.2.2.4; 20.7.1.0.2; 20.8.1; 20.3.5.0.8; 20.3.5.0.9; 20.4.2.2.8; 20.3.5.0.7; 20.6.3.0.7; 20.6.3.0.5; 20.6.3.0.10; 20.6.3.0.2; 20.7.2; 20.9.1EFT2; 20.6.3.0.11; 20.6.3.1; 20.6.3.0.14; 20.6.4; 20.9.1; 20.6.3.0.19; 20.6.3.0.18; 20.3.6; 20.9.1.1; 20.6.3.0.23; 20.6.4.0.4; 20.6.3.0.25; 20.6.5; 20.6.3.0.27; 20.9.2; 20.9.2.1; 20.6.3.0.29; 20.6.3.0.31; 20.6.3.0.32; 20.10.1; 20.6.3.0.33; 20.9.2.0.01; 20.9.1_LI_Images; 20.10.1_LI_Images; 20.9.2_LI_Images; 20.3.7; 20.9.3; 20.6.5.1; 20.11.1; 20.11.1_LI_Images; 20.9.3_LI_ Images; 20.6.3.1.1; 20.9.3.0.2; 20.6.5.1.2; 20.9.3.0.3; 20.4.2.3; 20.6.3.2; 20.6.4.1; 20.6.3.0.38; 20.6.3.0.39; 20.3.5.1; 20.3.4.3; 20.9.3.1; 20.3.3.2; 20.6.5.2; 20.3.7.1; 20.10.1.1; 20.6.5.2.1; 20.3.4.0.25; 20.6.2.2.4; 20.6.1.2; 20.11.1.1; 20.9.3.0.5; 20.3.4.0.26; 20.6.5.1.3; 20.6.3.0.40; 20.1.3.1; 20.9.2.2; 20.6.5.2.3; 20.6.5.1.4; 20.6.5.3; 20.6.3.0.41; 20.9.3.0.7; 20.6.5.1.5; 20.9.3.0.4; 20.6.4.0.19; 20.6.5.1.6; 20.9.3.0.8; 20.6.3.3; 20.3.7.2; 20.6.5.4; 20.6.5.1.7; 20.9.3.0.12; 20.6.4.2; 20.6.5.5; 20.9.3.2; 20.11.1.2; 20.6.3.4; 20.10.1.2; 20.6.5.1.9; 20.9.3.0.16; 20.6.3.0.45; 20.6.5.1.10; 20.9.3.0.17; 20.6.5.2.4; 20.6.4.0.21; 20.9.3.0.18; 20.6.3.0.46; 20.6.3.0.47; 20.9.2.3; 20.9.3.2_LI_Images; 20.9.3.0.21; 20.9.3.0.20; 20.9.4_LI_Images; 20.9.4; 20.6.5.1.11; 20.12.1; 20.12.1_LI_Images; 20.6.5.1.13; 20.9.3.0.23; 20.6.5.2.8; 20.9.4.1; 20.9.4.1_LI_Images; 20.9.3.0.25; 20.9.3.0.24; 20.6.5.1.14; 20.3.8; 20.6.6; 20.9.3.0.26; 20.6.3.0.51; 20.9.3.0.29; 20.12.2; 20.12.2_LI_Images; 20.6.6.0.1; 20.13.1_LI_Images; 20.9.4.0.4; 20.13.1; 20.9.4.1.1; 20.9.5; 20.9.5_LI_Images; 20.12.3_LI_Images; 20.12.3; 20.9.4.1.3; 20.6.7; 20.9.5.1; 20.9.5.1_LI_Images; 20.9.4.1.6; 20.14.1; 20.14.1_LI_Images; 20.9.5.2; 20.9.5.2.1; 20.9.5.2_LI_Images; 20.12.3.1; 20.12.4; 20.15.1_LI_Images; 20.15.1; 20.9.5.1.4; 20.9.5.2.7; 20.9.5.2.13; 20.9.6; 20.9.6_LI_Images; 20.9.5.2.14; 20.6.8; 20.12.4.0.03; 20.16.1; 20.16.1_LI_Images; 20.12.4_LI_Images; 20.9.5.2.16; 20.12.4.0.4; 20.12.401; 20.9.5.3; 20.9.5.3_LI_Images; 20.12.4.1_LI_Images; 20.12.4.1; 20.9.5.2.21; 20.9.6.0.3; 20.12.4.0.6; 20.15.2_LI_Images; 20.15.2; 20.12.4_Monthly_ES5; 20.12.5; 20.12.5_LI_Images; 20.9.7_LI _Images; 20.9.7; 20.15.3; 20.15.3_ LI _Images; 20.12.501; 20.12.5.1_LI_Images; 20.12.5.1; 20.12.5.2_LI_Images; 20.12.5.2; 20.15.3.1; 20.15.4_LI_Images; 20.15.4; 20.9.7.1_LI _Images; 20.9.7.1; 20.18.1; 20.18.1_LI_Images; 20.12.6_LI_Images; 20.12.6; 20.12.5.1.01; 20.9.8; 20.9.8_LI_Images; 20.18.2; 20.15.4.1_LI_Images; 20.15.4.1; 20.18.2_LI_Images

Weakness: CWE-648

1 references (advisories, patches, write-ups)

Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.

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