CVE-2026-121288
Security Advisory 0221
No exploitation reported by the sources we read.
- Published2026-11-10
- WeaknessCWE-303
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
An unauthenticated attacker on an adjacent network segment can bypass MD5 authentication and have unauthorized RIP route updates accepted by the device. Successful exploitation requires that RIPv2 MD5 authentication is configured on the affected interface. An attacker who can inject crafted RIPv2 packets could cause the device to install routes that redirect network traffic through attacker-controlled paths, create routing loops, or blackhole traffic, disrupting network connectivity.
Timeline
dates in UTC- 2026-11-1020:09CVE publishedCNA
Versions per branch
Products declared by the CNA
As Arista, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.
- Arista Networks EOSother versions: not affected
platforms: 710 Series, 720D Series, 720XP/722XPM Series, 750X Series, 7010TX Series, 7020R/R4 Series, 7130 Series running EOS, 7170 Series, 7050X3/X4 Series, 7060X/X2/X4/X5/X6/XE7 Series, 7260X/X3 Series, 7280R/R2/R3/R4 Series, 7300X/X3 Series, 7320X Series, 7358X4 Series, 7368X4 Series, 7388X5 Series, 7500R/R2/R3 Series, 7800R3/R4 Series, 7700R4 Series, AWE 5000 Series, AWE 7200R Series, CloudEOS, cEOS-lab, vEOS-lab, CloudVision eXchange, virtual or physical appliance
Affected- = 4.37.0Fno fix statedcustom
- ≥ 4.36.0F, ≤ 4.36.2Fno fix statedcustom
- ≥ 4.35.0F, ≤ 4.35.6Mno fix statedcustom
- ≥ 4.34.0F, ≤ 4.34.8Mno fix statedcustom
- ≥ 4.33.0F, ≤ 4.33.10Mno fix statedcustom
- ≥ 4.32.0F, < 4.33.0Ffixed in 4.33.0Fcustom
- ≥ 1.0.0, < 4.32.0Ffixed in 4.32.0Fcustom
Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-121288 yet.
Fix
No fix published by the sources we read yet. NVD record
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Metasploit modules
- none listed Metasploit Framework
Sources
Identifiers
- EUVD-2026-122809same flawENISA EUVD · LicenseRef-ENISA-legal-notice
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CVSS 4.0 vector
- CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published
- 2026-11-10
- Last Modified
- 2026-11-10
- NVD status
- Received
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