In Realtek eCos RSDK 1.5.7p1 and MSDK 4.9.4p1, the SIP ALG function that rewrites SDP…
Priority HIGH 68CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In Realtek eCos RSDK 1.5.7p1 and MSDK 4.9.4p1, the SIP ALG function that rewrites SDP data has a stack-based buffer overflow. This allows an attacker to remotely execute code without authentication via a crafted SIP packet that contains malicious SDP data.
Why it matters now
EPSS 0.36704 98th 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:realtek:ecos_rsdk_firmware:1.5.7p1:*:*:*:*:*:*:* | 1.5.7p1 | Vulnerable | Realtek |
| cpe:2.3:h:realtek:ecos_rsdk:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Realtek |
| cpe:2.3:o:realtek:ecos_msdk_firmware:4.9.4p1:*:*:*:*:*:*:* | 4.9.4p1 | Vulnerable | Realtek |
| cpe:2.3:h:realtek:ecos_msdk:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Realtek |
- cpe:2.3:o:realtek:ecos_rsdk_firmware:1.5.7p1:*:*:*:*:*:*:* Versions 1.5.7p1 Vulnerable ·Realtek
- cpe:2.3:h:realtek:ecos_rsdk:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Realtek
- cpe:2.3:o:realtek:ecos_msdk_firmware:4.9.4p1:*:*:*:*:*:*:* Versions 4.9.4p1 Vulnerable ·Realtek
- cpe:2.3:h:realtek:ecos_msdk:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Realtek
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-27255
- 2026-10-03 Alias added: GHSA-hcc6-7m2q-wj56
References
Sources
- CVE-2022-27255 · CVE Program
- CVE-2022-27255 · NVD
- FIRST EPSS
- GHSA-hcc6-7m2q-wj56 · GitHub Advisory Database · CC BY 4.0
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