# CVE-2010-3035: Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service

> Remote attackers can cause a denial of service by sending crafted BGP prefix announcements with unrecognized transitive attributes.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Yes, since 25 Mar 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Aug 2010
- **Updated:** 12 Jan 2026
- **Also known as:** GHSA-9q29-g37m-5wmp

## What is CVE-2010-3035?

CVE-2010-3035 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 30 Aug 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco IOS XR 3.4.0 through 3.9.1, when BGP is enabled, does not properly handle unrecognized transitive attributes, which allows remote attackers to cause a denial of service (peering reset) via a crafted prefix announcement, as demonstrated in the wild in August 2010 with attribute type code 99, aka Bug ID CSCti62211.

## Which versions are affected by CVE-2010-3035?

It affects 1 product.


Products: Cisco Ios Xr.

## How do I fix CVE-2010-3035?

No fix has been published for CVE-2010-3035 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

## Is CVE-2010-3035 being exploited?

Yes. Attackers have exploited CVE-2010-3035 in the wild since at least 25 Mar 2022.

## Other vulnerabilities in Cisco Ios Xr

- [CVE-2020-3118](https://insights.sbomify.com/CVE-2020-3118/): Cisco IOS XR Software Discovery Protocol Format String (high 8.8, exploited in the wild)
- [CVE-2020-3569](https://insights.sbomify.com/CVE-2020-3569/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2020-3566](https://insights.sbomify.com/CVE-2020-3566/): Cisco IOS XR Software DVMRP Memory Exhaustion (high 8.6, exploited in the wild)
- [CVE-2022-20821](https://insights.sbomify.com/CVE-2022-20821/): Cisco IOS XR Open Port (medium 6.5, exploited in the wild)
- [CVE-2009-2055](https://insights.sbomify.com/CVE-2009-2055/): Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service (medium 5.9, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2010-3035 and fix it if it is affected.

What it is: CVE-2010-3035 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 30 Aug 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2010-3035 in the wild since at least 25 Mar 2022.

Affected product: Cisco Ios Xr. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2010-3035/ (Markdown: https://insights.sbomify.com/CVE-2010-3035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2010-3035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2010-3035
- OSV: https://osv.dev/vulnerability/CVE-2010-3035

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From sbomify Insights: https://insights.sbomify.com/CVE-2010-3035/
Summaries are generated and may contain mistakes; the official description above is the record.